Quote Originally Posted by kekvitirae
They may take a few turns, but anyone who's serious about rushing would never try to build them in a single city. Use multiple cities to do so.
But that is the point... It takes quite a while to get to that level in cities that are close enough to each other. And it is rather expensive.

You would basically be stumping your development of economy, religion and infantry. I don't think it is worth it.

My ERE campaign ended with me being able to train generals in four cities (though the last was taken as the remaining requirement for victory). Constantinople, Antioch, Rome and Carthage. Even if I had wanted to rush generals, I would have been keeping my own armies dry of heavy cavalry, and they were after all far apart.

So it depends it seems.