I'm not sure because I can't remember which startups only had one founder when we funded them, but I know there are 2/36 in the current batch and there were 3/26 in the previous one.
Both Xobni and Dropbox were single-founder startups initially.
"Both Xobni and Dropbox were single-founder startups initially"
Initially, I think, is the key here. Am I wrong to assume that you loved the idea, the technology, and the potential of the marketplace and that any concerns you might have had over a single-founder was assuaged by the founder's desire (but not yet accomplished) goal to find a proper co-founder/partner?
Both Xobni and Dropbox were single-founder startups initially.