I have to agree that lag has been an issue for me, and not just for me. Most of my friends that I play with also experience lag to some degree or another. It's not always at the same time as myself, but we do. I've also been in houses that are near capacity (25 or more sims on the lot) and everyone is lagging badly. Sometimes it happens, sometimes it doesn't. Seems to depend on the lot, the day, and the number of sims.
I also have not previously had issues with lag at all. when I played my CC sim, I may have occasionally had a day when I may have lagged, but it was always when there were overall issues with the servers or when others were also having issues.
So, I'm really thinking that it's an issue with EALand somehow.
I do hope the issue is addressed at some point. Because it's a real drag.