I can't speak for anyone else, but you seem to be missing the biggest issue with this map: saying "you guys" excludes anyone but those identifying as male. You may not mean it that way, but I've had women be offended when I used that in the past, and I wouldn't like being referred to as a "gal" in a group of women. It's just not accurate.
Personally, for a gender-neutral way of addressing a group, I like "you folks".