Hm, was I really condescending in my comment? I've gone back to re-read it and it doesn't strike me as condescending, indeed when I wrote the comment I wrote it simply in a matter-of-factly way with no emotion.

But maybe I slipped. Can you please point out which part was condescending? (serious request; am interested in improving my written speech to be both clear and not condescending in any way)

For what it's worth, I didn't find your comment condescending at all and was puzzled at that remark.