Yes of course, that must be right...
I thought I cracked it because I heard a sentence read out which contained a comma in an unexpected place -- this was reflected in the reading of the sentence.
Perhaps that was just chance...

And as you know.... I have "bigger fish to fry" in my Russian studies than commas. I think I'll get to those in about a year from now! But now that I know that it's different I can make an effort to look out for it. If I ever start reading as I keep planning to do, then maybe I can proper Russian punctuation from that.