lol I like that theory- optimum snuggle quotas. Really though, if you are following your baby's cues, and sleeping so well on her own must I guess be one, then you are stivking to your ideals, so to speak.
I love slings, too. When we arrive somewhere, DD2 gets out of the sling to play, whereas if she's been in the buggy she wants a cuddle when she gets out.
Here's hoping for good nights sleep!