Big difference uh?
Yes, but most of it is probably just posturing. Bears feeling confident enough to throw up more sell orders. There's a big difference between putting in a sell order and leaving it there when it's about to be hit. We've seen ask walls pulled, and also bought many times during this rally, so I don't know why you are concerned this time. There was an idea going around during the last rally that we would just gobble up all the asks, but I think that was silly.
I'm not really that concerned... if anything, I was getting spoiled with those huge jumps a slower growth rate is healthier.