I think you have to differentiate between ability and aptitude. I think I have a stronger aptitude for math than most non-NTs, but my ability is lacking. I have an ESFP roommate and an ESTP roommate who are both engineering majors that could easily school me even if I could potentially develop a better understanding of it.
"You will always be fond of me. I represent to you all the sins you never had the courage to commit."
Reason is, and ought only to be the slave of the passions, and can never pretend to any other office
than to serve and obey them. - David Hume
No, it doesn't necessarily mean it. I'm living proof that it doesn't.
However, I do think NTs would be generally better at maths than other types would be. Nonetheless, this could simply be down to the fact that NTs generally succeed (and regularly exceed their peers) academically anyway. (Sadly, I was not one of these NTs. However, I'm basically considered by most to be quite intelligent in life in general, and simply don't 'put the effort in' academically. I have changed that recently, but I'm certainly not a prodigy of the academe.)