Only one. However he's delighted with his iMac. His only complaint was that he hadn't listened to me earlier.
My father's PC died last week. For some time now I have dropped subtle (and perhaps not so subtle) hints to buy a Mac if his computer ever needed changing. Of course he went ahead and bought another Dell. When I expressed my disappointment he said "Macs will eventually be bought out by Microsoft so why change?".
OK he has ADD (Apple Aversion Syndrome), but I've heard this so called 'fact' from quite a few people now.