I was thinking the same thing reading that thread. I would lay odds on the line that most couples do, but that perhaps gay couples have less of them because they generally think along the same line. For what its worth, I have been with my partner for 2+ years now and I can’t think of any communication issues we have, and most of my friends who are in LTR’s don’t have any of those. But we may just be lucky!
Jeeves