The difficulty of block 4370224 (mined just a few minutes before I typed this) is 2634.238 T.
So the difficulty is already going down noticeably and the fork only happened about 90 minutes ago. By tomorrow we should see more clearly where it will settle, and as was mentioned above the pools should have better profitability estimates by then as well.
Yeah I noticed the difficulty is dropping as well down 8% since the fork , so looks like I was correct
If we have a nice difficulty adjustment as well as a block time reduction they might be right in saying profitability could will be back to where it was around august/sept
hold on to your hats folks