That's not a significant difference 
not when compared to 100% but if you compare it to what has happened with difficulty increases in the past...
would you rather a +2% change or a -20% change
Anything in the negatives, it could go down -.0000000000000000000000001% and I would be happy, as long as it doesn't go up...EVER!
Realism factor (1-10):HAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHAHA
really don't want it to go up? the % i was referring to was the change in the amount earned per day. eg 1 btc vs 1.02 btc = +2% which is unusual as normally miners are gradually earning less per day.