Frankly I think there are very good reasons to be opposed to Turkey joining the EU. The best one is that the EU isn't ready to have anyone else join right now. That excuse, however, will only carry water if it's backed up by some concrete steps the EU can take to get to a point where expansion is again possible. These benchmarks would provide a roadmap and a timeframe. At some point, through lengthy delays, a country like Turkey may find itself presented with different opportunities for allegiance.
I certainly think Turkey joining the EU is better than Turkey hitching its post with the rest of the middle east. I think Obama would prefer it as well.
Basically Obama is calling out Sarkozy for being full of it. Who can argue with that?