It's hard to say... is it visible in a well lit room on content that isn't particularly dark? If so, that would definitely qualify as too much. It can be very much a subjective thing though. I've seen friends monitors which are terrible to my eyes, but they don't seem fussed. You're always going to get some in a dark room on dark content, but as I say, if it's very obvious in well lit conditions on lighter content, I'd be looking to return it for sure.