I've been letting a brand new level 1 character whack away on a level 1 training dummy for the last 40 minutes. Currently sitting at a 5% crit rate at around 1500 hits.
I might buy some food for it and see how much % I get over the 30 mins of food.
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Edited: well with the Dodo Omlette I got 4 Crit. Over 484 Hits I ended up at 6% Crit. I guess the game crashed so it didn't get a great amount of hits as I would have liked, but 4 Points of Crit getting anywhere near an extra 1% might indicate that a point of crit is stronger at lower levels, than at higher levels.
Also I can't remember how to get the reading past 1 decimal point, because those are rounded up values.