Had this happen to me several times over the years.
Usually in a work context..as I'm not based in one place, I move around different settings.
Anyway there was a lady I'd worked with once before who was very extroverted and outgoing it seems, which is good.
I was meeting a couple of other new colleagues for that day. I introduced myself and then said lady just pipes up ' She's quiet!' about me.
Why? I don't see it designed as a compliment and usually have no idea how to react so I just laugh. But I really don't see the need.
Yes I'm quiet with people I don't really know. But i did make some conversation, I'm polite and helpful. I'll never be a hugely exteoverted person but so what.
Anyway it's happened a few times in life as I've said, anyone else? How on earth do you react?