I was wondering on this, we have seen reports of big mining farm popping up once in awhile. We all know they made the difficulty jump like mad. But will this affect or shorten BTC initial end generating date ?
Yes it will. The fact that the time between difficulty changes have almost always been less then 14 days means that it will both take less time before the next halving of the block subsidy and the time before block subsidies go away altogether. Both of these statements assume that the difficulty will not decrease in the future