The network hashrate just stagnated for a few days, it's picking back up now. It's not like that hasn't happened like every couple difficulty jumps. Current projection may be for just a 12% difficulty jump, but that's just an 'instant' projection based on the recent average block solving speed. As the network speed increases over the next couple of days, by the time block 135072 comes around, the difficulty jump will probably reach 25-30%.
I'd guess difficulty will keep going up by 30-50% at least until  ~5 mil.