So of course now that I posted that I’m not really experiencing any lag in this save, I’ve started to notice some weird things. The Whiz Kids club at the school were all sitting in the cafeteria, supposedly talking to each other, but all they did was smile and stare at each other, with no sound coming out. For at least three Sim hours. Sometimes they would seem to freeze in place entirely (though the clock would still run). I also found it strange that McKenna was doing her homework by writing on the cover of her book. Hrm.
While all that was happening (or not happening), the caterer spent at least two Sim-hours staring at that chicken cooking on the stove. In that pose. Just staring. She eventually served the food but it took forever. So either my game is lagging badly, or these are post-patch issues. I think I remember reading that someone else was having the talking with no sound issue, but I can’t remember who that was. :-/
So far this has been a very unsatisfactory playtest - I really like how the school turned out, but it might just be good for story pics only (or if you use Zerbu’s mod).
(I’m playtesting with zero mods in, BTW - this is my CC-free save.)