What are you using for your FTP client? BTW, the Finder can mount FTP servers just as it does any other networked volume. Any Mac application can read files on a mounted FTP server without downloading them first.
He probably means "will it bring over the resource fork?". If you use, for example, CrushFTP for the FTP server and CaptainFTP for the client, sending or receiving a Mac application will result in a broken app that is missing its resource fork.