That's kind of funny because I feel the xoom runs better the longer I have it up. I almost never reboot the device. I will say it does have its qwerks. Occasionally widgets won't load or early update. Overall I really like the device
I sometimes get lagg on my evo...it always happens when it is going from 3g to 4g or from cell to wifi. I am wondering if it is searching for a 3g signal even though your on wifi?? Can you turn the 3g off all the way? If that fixes it post back...
I occasionally get a bout of lag on the Xoom after it's been up for awhile but I'm attributing it to some incompatible apps that I side loaded. The browser and market tends to bug out the most out of anything I use on the Xoom, however.