Has anyone else noticed that a lot of "tomboys" come across almost like Daffyd in Little Britain except they have friends?
"But you're a chick. Right?"
"It says no girlS. We're allowed to have one."
Seriously though, even as a person who gets on better with guys*, I've started to hear "I have no female friends" as a warning sign no matter who says it. Ditto "no male friends", but people don't seem to brag as much about that. For me, "I have _few_ female friends" is shorthand for "I have few friends, and because I have tits I have found that some men are easier to approach than the alternative when it comes to casual meetups". It's not even a good thing in my own case, so my lack of trust for people whose entire sense of identity comes from being "one of [insert any group]" is probably reasonable.
*during the late teen phase where damn near everyone available in my town was an intolerable drunkard (that being the reason for their perpetual availability) and most reasonable people were busy at school or work, anyway
As for tomboys assumed to be intelligent, nope, sorry, I have never seen this. Girls who are clearly badge-wearingly into stuff associated with male "nerds", yeah, but not just straight-up "tomboys".