My shoes are standard Sidis - two velcro straps and a rachet. The insole isn't an orthotic - just your standard insole material cut to fit my shoe and give that leg a tad more height, so I don't have any problems with my foot not fitting anymore (come to think of it, most people including me have feet that are slightly different sizes and it definitely looks like my left is smaller - hah! I can measure my feet and yup - the left one is about 8.5 inches long at its longest, the right almost 9)

I just had her do my winter shoes (they are "touring" style shoes, with recessed cleats so they are somewhat harder to adjust). The shoe with the insole felt a bit weird and tight when I first put it back on, but after a few minutes with it on I didn't even notice the insole any more.

It's pretty well impossible for me to measure my own legs accurately, but roughly giving it a try I'd say my left leg is definitely somewhat shorter than my right or perhaps you are entirely correct, my right leg is longer than my left I do have one wedge in my right shoe to tip my knee in a little - there are 6 plus the insole to prop up my left!

This is all quite interesting - it makes me think of other things too. I've been doing step-ups as part of my winter training/core strength routine and I've noticed that I have a tendency to swing my my right leg out when I do it if I'm not paying attention - could very well be an unconscious compensation for that one being a little longer and hitting the ground sooner than I expect????