I did. Honestly, had I not gone thru the NT Scan and had the head perinatalogist (I think that's his title?) tell me it's a girl and he's over 80% accurate, I wouldn't have believed you could find out at 12w. He basically showed me some line and printed pics and explained that while external genetila is still developing/not developed yet, there is some line/nub thing where they can tell. It's either horizontal or vertical I guess.
I was 12w5d and was told girl. At my 18w u/s, girl was confirmed. I didn't buy anything pink until that 18w u/s though!