The current pre-release of the client ("pioneer" in the version) is only compatible to itself. So you can only play with other testers. Please be aware!
@Freedom_ All that proves is that your opponent was incapable of bombing you with the 6k mass advantage, and that they'd rather run random t2 units into your com on a mass feeding frenzy.
For reference 6k mass in bombers will get you 16k dmg each pass.