This is madness: novices arguing with Chuck Ellsworth on a point like this.
Take his word for it. 500-700 feet is not a low level circuit and one minute touch and goes at 150 feet are a really useful exercise for the PPL, even in a PA28 or C152, and may one day save your life.
Nobody is arguing with Chuck.
Nobody, as far as I can see, is saying that 500-700 feet is a
low level circuit either. What we
are saying is this is the height at which
bad weather circuits are carried out during PPL training. Any lower is beyond the realms of that particular exercise.
Hope that clears things up a little.
VFE.