It's not so much the poses I mind, they change again so soon you don't have to look at any one in particular for that long anyway. It's the lag.
I have a sims that know a lot of other folks and whenever I go to the relationship panel or use the phone book, the lag from it having to update all those thumbnails is ridiculous.
I don't even know why EA would include something like that. It's not like people were begging for a "feature" like this. But leave it to EA to not fix what's broken and add stuff that's ignorant.