Admittedly my experience with TVSA goes back 20 years, when they were still in the Tarago Valley! The owner and CFI was also the ATO and on my unrestricted test he nagged away at me about every little thing until I was so stressed I couldn't fly straight. He did pass me, but told me I was very marginal. I flew with another instructor some time later and he found very little wrong with the way I flew.
I suppose it's all about personalities.
Walrus