I can't say that I have noticed a difference, but it makes sense. Your left side is usually the area of the colon that flares first. At least it is for me.
I can remember a bad flare I had about 12 years ago where I was on the can, and I'd think that my "evacuation" was complete, and as soon as I'd stand up, I'd get my pants back on and suddenly, I was locked and loaded to go again, and with urgency. IT's like when i sat down, I crimped my colon like a hose, and when I stood up, it uncrimped. Pretty crazy.