Hi,
I have trained (briefly) at that gym and been told the same thing. The guy does come from the old school where that was the thinking.
I asked the same question, and there was pretty much universal disagreement. Except I asked on the martial arts (or was it collegiate sports) board.
You are actually asking in the wrong place - try that sports board, etc. I think BRR will give you some advice to the contrary. So will many others.
It's a good gym. Just go ahead and do your lifting. Maybe I'll see you there in February.