[Skyhook]

This is another 'depends' situations. Sure the pilots who learned in an uncontrolled pattern are often tense and use interesting R/T technique, but there's the other side also. I managed a small turf airport for sixteen years and I have vivid memories of those who came here from controlled airspace for their short/soft field work not looking out of the window and effecting separation. Some seemed to think 'somebody else' was going to keep the metal from bending. There were close calls that had shadows merging, landings facing each other, and everything in between.
So, I'd tend to cushion any opinion on this question with 'it depends' on the quality of instruction and the attitude of the student. That sounds familiar, I'll bet.