Regarding critical damage with the revamp

The skill description says 10 x 6%, and there are no crits at under 10 combos. Where is the extra 10% coming from? Is the skill description wrong and it should be 10 x 7% ?
The only way to know for sure would be to do a painstaking analysis of a long stretch of video with high combo.
Or else someone should do what Cyanne said just to see if this is true. Any non-crits at all would mean that the current 70% base assumption is wrong. Too bad Machlear's are so rare.
Has this 70% has ever been proven, or is it just based on the one post in this thread from last summer:
http://www.southperry.net/showthread.php?t=16709

Arans have an extra 10% base crit when the critical skill is active. It's 10% + 10x6%.