I think the typical order has more to do with grammatical conventions actually.
Joe is heavier than Bob
Joe is the subject, the one we're talking about; Bob is just an object we compare against.
Joe weighs more than 90kg
90kg is less than Joe weighs
The second one is a very odd sentence.
[subject] [verb] [object]
[variable] [operator] [...
Similar to Buffy, I suspect that which use is more natural depends on the framing of the problem.
while (countdown > 0)
makes perfect sense. By contrast,
while (0 < countdown)
feels less intuitive, if only because there is a bias towards leaving the variable on the left side of an expression.
I think that the key (and this is what I would ...
First, I doubt that there are any such statistics because the effect would seem to be so small as to be overwhelmed by other, more common, things. You could, perhaps, create an instrument (as in a compiler) to look for such things and look for effects in, say, unit tests of the code. But that implies that a lot of things come together.
But, I would also ...