I don't have a Facebook. How seriously does this hurt my chances of meeting people interested in a relationship with me?

I used to be approached far more often for dates or fwb, and I deleted my accounts January 2011 to free myself from petty bullshit. And now I've been quite lonely for months, and first meetings are always promising but then they stall. Is this dry spell because of lack of social media presence, or am I being paranoid?

Say you met me in a class, thought I was a pretty neat girl, and went online to find I had no Facebook or Twitter or anything like that. Would this kill my chances with you? Is a total lack of social media presence more or less suspicious than a Fb just created last week?