With the jump in alt coin pricing over the last 30 days, I think we're in a different environment than before and the rules have changed.
I agree that the rules have changes and i think they changed 've in many levels not only on mining.For all i know people are looking for the next coin that is going to get pumped. Seems it's ppc turn now.
profitability is over 1000% more then a week ago, its crazy (on a hd7950 you can earn 30$ p/day atm).......... it looks almost like manipulated market 
What coin do you mine and you get a return of 30$/day with your 7950?