Umm. No.

I was there. Unless my iPhone 3G, MacBook Pro, and iPad all have mysterious pre-release drivers as well, it most certainly was not a driver problem causing the wifi mess. It was unreliable throughout the week.

People who were there last year claimed that the wifi worked quite well. That was before the MiFi became popular, though. (And the crowd size was about the same as this year so Apple clearly knew what to prepare for.)

In a crowd of over 5,000 people there were at times over 500 hundred wifi networks! There should have only been one - the official WWDC network.