Had plenty of moderate and severe turbulence on a nimrod < 500' over the angry north atlantic but only a couple of moderate encounters in 5000 airline ops.
My "subjective" opinion of turbulence tends to classify it lower than most I've flown with in the airline world. I think rather than "momentary loss of control" the "objects being thrown around" and "impossible to walk around" statements are better gauges of severe turbulence. If stuff isn't flying around you are in no more than moderate according to the book.