Except that also occurs when both things are very low - not a compliment either.

Best to steer clear of 'ratio' if praising two traits, sum them or something, don't divide by one of them.

I think the point of the comment was to praise them for how they manage to have equal amounts of both things, when those things are rarely seen together. Most people would assume from context (given that the comment is phrased with positive sentiment) that it was meant that the ratio was low and the implicit sum was high.