I don't understand this one bit, but we might have the best defensive ratings in BB. Last season our defensive and overall ratings (neutral court, non-OT, 0/0 GDP or 1/1 GDP correct) were better than #1 ranked China, #2 ranked Poland, # 3 ranked Slovakia, #4 ranked Czech. Seriously. In no way do I think we're actually better than China and Poland, or more than equal to almost a dozen other teams, but for some reason our ratings were the absolute best. GS probably.
GDP helps a lot though. Our GS this week (especially on defensive players) was much better than in our earlier scrims too IIRC.
I'll wait for GS update to comment on Czech game. I'll have no better idea than you or others, though. Czech is really good. We're also good, but maybe not as good. I dunno.