Killjoy.
If MerricB wants to do the Snoopy Dance and others want join in, what is the harm in that?
It is not like there is a finite pool of enthusiasm and that if MerricB is giddy, then someone else is going without because MerricB has taken more than his share.
If you are bothered by the hype and the enthusiasm about 4e, stop reading the 4e threads then. I am sure the Razz would like someone to comiserate with.
Personally, lilke PirateCat, I have found each new edition better than the last. So, while I am not doing the Snoopy Dance (I don't dance well), I am looking forward to the new edition. A lot of others are as well. Some aren't. That is life.