In reply to Pero:
I was on North-east Buttress on Saturday (26/5) and then Tower Ridge (27/5) on Sunday. There's only a few very small patches on the path approach before the start of NEB, but nothing on the climbing route at all. Tower Ridge only required a 3-4 steps on rapidly disappearing snow in the slot of the detached rock which you go through before reaching the Tower. Otherwise TR was also completely clear. No case at all of too much snow on top on either route. All clear.