you are failing to understand how markets work. Sure all things being equal an increase in supply will lead to a decrease in price but markets price these things in gradually over time. the switch to asics for example was probably priced in over a year ago.
*gasp*You're saying there's a chance that ASICS were already priced into the markets!?

Believe it, I too have been told the same thing by many miners all whom have a very large stake in mining.