That was probably me who mentioned that; I've discussed it on a few of these forums lately. I've struggled with getting out of breath for years, but found in the past when trying to solve this issue that when I swum slower to try and use less energy, the fact that I was breathing less often made me equally as exhausted. Eventually, I've now relaxed in the water, gradually got more efficient and generally improved my swimming and found a happy medium between energy expended (speed of swimming) and frequency of breaths (stroke rate). The magic speed for me was surprisingly slow.
My only suggestions are to keep working on your stroke, but also to mess around with the speed you swim at to find that sweet spot between energy expended and frequency of breaths.