I noticed the slow site loading as well @Obspogon, which I think definitely affects my enjoyment a bit as someone who doesn't own a TamaNotchi, but likes to putter around feeding other people's 'Notchis. The concept in itself is really cute otherwise, and I always do enjoy a good pet game.
Hypothetically speaking (and not sure if there already is), I think if there were a way to feed the pet without sending you to the page, that would improve my player/spectator experience considerably, but then again I'm sure the slow connection is a completely different/bigger problem altogether haha.
EDIT: Weirdly enough, my experience is that mobile seems to not have any issues with the connection. Wonder what's goin' on with that.