Well, high maintenance and high standards do not go hand in hand.
when I hear of people talk about high maintenance women.. it's used negatively, implying the woman requires too much "care".. whether that be physically (must have the right shoes, right model, right make-up, right hair - image is everything) or emotionally (constantly needing emotional support, cant make desicions etc) that the man feels he is giving too much of his time, energy and money on things that are not of equal importance between them.
When I hear people tak of high standards, it's usually used positively - in a moral setting (correctness etc), or physical (cleanliness etc)
Personally, I wouldnt bat an eye if a man left me because my standards were too high. I might think twice if he felt my maintanence was. Oh yeah - he could still go.. hahaha - but I'd likely reflect on the comment.