I'd have to imagine it'd put some people off.

Never had that, actually lot of people don't use their real names on dating sites or even FB. And if someone asks you say its for privacy reasons, people do understand. Look at Okcupid, its all nicknames there ;) same goes for other sites. Same goes for Apps.

It's just another factor in computing compatibility.

There was a time when attaching your real identity online was considered a major safety risk. That time hasn't past.