Men vs. Women: Who is Friendlier?

This topic came up recently, at my work.

Within their own sex which are more welcoming and friendly to a newcomer? Are men more welcoming to a new guy or are women more welcoming to the new girl?

If you have a group ( perhaps a classroom, sports team, work group, school club, social circle, etc.) of two dozen men (or women) ALL of the same sex and a newcomer of the same sex arrives and tries to integrate within that group - who would have it easier? The new guy or new girl?
Men vs. Women: Who is Friendlier?
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