This rings particularly true with me. I don't count or really have much knowledge of time signatures, but don't struggle playing them, unlike some of my more theory knowledgeable band mates. I just somehow know when it feels right.
When I first started to play guitar, RHCP's Breaking The Girl was probably the first song I learnt, I had no idea it was an odd timing, it just felt nice. It's in 6/8 but I wouldn't know that without looking it up.
I also learnt to play in the grunge era so maybe that does have a bearing on odd time signatures feeling relatively normal.