I'm running AOKP rom build 36 wiht Nova Launcher. On Apex Launcher same thing.
On Honeycomb 3.2 stock with Go Launcher HD same lag.
I will try remove all the widgets from my homescreens to see if I have lag.
I will try just of curiosity ADW Launcher ex too.
L.E. : Removed all the widgets on Apex, Nova and Trebuchet : same lag.
Installed ADW Launcher Ex not the same lag but still now looking good. Don't know whats the problem.
Anyway, thank you guys.
SONY Xperia Z 16 GB Black
Samsung Galaxy Tab 10.1 3G 16 GB Black