Actually, that is false. The majority of the network as it stands right now (over 60 TH) is still comprised of GPUs and FPGAs. Avalon has only 19-20 TH in the wild and ASICMiner only has online about 7 TH at this time. Of course, this is subject to grow in the next weeks, but still, that only accounts for ~26-27 TH of the entire network. Unless there are some ghost ASICs hashing away in a hidden Illuminati bunker, most of the network is still made up of old tech. The recent growth spurt the network went through (and I'm talking about the last couple of weeks) is due to the price going to insane heights and luring in more GPU miners from the general public.