A lot of X2 users are either getting phones with recent 2.3.4 updates or 2.3.5 updates or they are receiving OTA's, many of which contain fixes for the exploit that most root methods use to root the X2. You need to look up the new Zergrush method by a dev named Doomlord. That method works for all of the new 2.3.4 and 2.3.5 updates that the Nazi's at Motorola and Verizon sent out. Those jerks never wanna let us have any fun.
You are right, 2.3.5 has not been available OTA but there are places to download the full "official" update. The latest builds of 2.3.4 that have been sent to some X2 users (including me ) can only be rooted using zergrush or a root method that uses the same exploit.