Well, you can have your laughs at my expense, that is fine. I can take it.
But here's the deal. The reality is soon upon us and it will be irefutable. It will be undeniable. It will be factual.
And that reality is the simple fact that the G5 either will or will not match or beat the best PCs (or G4 Macs for that matter) at a given task. You can rationalize it all you want. You can talk Cache, you can talk megahertz myth. You can talk architecture. You can talk 64-bit. You can talk optimized. You can talk whatever you want. In the end, it either is faster or it isn't. (Of course the G5 is faster across the board than the G4, but is it faster relative to other speed gains in the industry...).
As for optimizing as we go. I'm not holding my breath. Yeah, Apple will optimize their OS and their Apps, but Altivec proved that developers are in no rush to take optimizing for Apple hardware seriously. Several years of Altivec netted virtually no gains from thrid party developers. Same for DP aware apps. Apps like Media Cleaner are a freaking joke. Same goes for Lightwave. And the Photoshop plugin for Altivec. Nice try. Thanks for nothing. Shall I go on? Nah...
Here's a nugget. Altivec didn't help help Apple one bit to catch up with the speed gap.
RacerX:
Yes, I am highly cynical after dumping thousands of dollars into woefully inadequate G4 chips and sluggish GUIs. I make a living off performance and the G4 didn't cut it. The only reason I stuck around (aside from untold investments in software) was because of that classic Apple dream, the hope for something better, lots better. The G5 may in fact be it, but it's got a ways to go to really knock my socks off. That's all I'm saying.
As for the prorate example. Yeah, it's not the best approach, but it's just an example. Just something to work with for conversation. I think it's very safe to say that a 2 Gig DP G4, were it to exist, would compare admirably to the current DP 2 Gig G5. That concerns me. I was expecting a wider gap in my theoretical model. In a few more months or a year or two, if the 64-bit dream and other optimizations don't kick in, then I'll really be concerned.
Craig Hunter's Specs:
Cool. Thanks for the link. Too bad I have no concept of what to do with that information. Where's the Photoshop, Lightwave, Quake, etc. tests? Also, Craig himself helps prove my point :" Thus, the increased raw vector performance of the G5 is largely due to its higher clock speed.", regarding vector performance.
And really, Jet3D? I hate to be a jerk, but that test does not qualify for anything that the average G5 will be used for. That is a completely obscure test that obviously highlights the G5's stronger points. C'mon!

Craig's tests actually made me even more concerned. He flat out says that the best G5 still lags the best PCs. And you better believe 3.2 gig PCs will be replaced very soon.
I'd be curious to see truly comparative charts using all processors from all manufacturers and OS's. I've always wanted to start a site that allowed people to submit their own data using files provided by the site (Photoshop files, 3D models for rendering, 2D animations for AE, demo games for Frame Rates tests, etc.) Too lazy to do it I guess. Yeah, the G5 is faster. Great. But how does is compare to the best PCs today and how will it compare in six months or two years when the G5 has had time to mature and unfortunately the Intels have had time to grow yet again.
Macbidouille:
Thanks for the graph and link. That chart (after having translated its supporting text through Sherlock) again reaffirms my prorate theory. That chart is indicating how efficiently FCP performs its RT functions relative to other machines. Result? 30% benefit of DP G5 2 gig versus DP G4 1.42. Exactly in line with my prorate example.
Footnote: I alway sending up feeling the need to defend my position. I'm a huge Mac fan. I have all the Mac history books and have read them multiple times. I have distant conenctions to Stevo (he has no idea I exist, however). Apple changed my life with the Apple II and the fist Mac. Literally changed my life. I love Apple. I'm just not blind anymore. Stats are stats. I'll probably continue to use my beloved Macs until I die, but I'm definitely going to complain if they don't deliver every step along the way.