In the little over a year I've lived in Bellisseria, I've only had one home where I had a bit of lag. Sadly it was in my Victorian home. All the rest have been lag free. Even the surrounding areas when I've gone boating, bike riding, roller skating, horse back riding, or exploring on foot.
I'm sorry you're having lag issues. I hope you can figure out what is causing you to lag so you can enjoy Belli and your home.