From early reports, the XE1 seemed to have that EVF "freeze" that I saw in an XPro1 I rented. According to this report Fuji X-E1 news and test roundup! Matches FF DSLR quality! | Mirrorless Rumors there is no freeze, with the video to prove it.
Comments from the XE1 users on sc? The AF seemed pretty quick, too, on the XE1.