Doing autos in R22 is definitely 'enhanced' to do them properly and include fulldown training, compared to, say B47 or B206, even S300 is easier on student (by design intentions, too).
Unless with experienced CFI, I'd rather do lower entry airspeed autos, especially low-ish level. Had one zero airspeed entry demoed by junior CFI some years ago and at the time, didn't know more/better, else I'd rather tell him not to fiddle with the R22 at his level of experience. Not saying one can't do it, but easier to mess up. I guess I'm more cautious after some instructing and from reading about all the training (and non-training) crashes and fatals in R22 past few years.