I don't think so. In most states in the past couple of months, other candidates have gotten 2% or less combined. WV was a fluke with 7% for Edwards. Kentucky is the only remaining state where I expect a similar (though lesser) fluke. In caucus states, of course, it'll be even less than 1%, since supporters of nonviable candidates will switch to their second choice right there, or not count. If they can get over 15% in some precincts they'll elect some delegates, and there may be some uncommitted delegates because of that, but I doubt there will be much - people who aren't supporting Obama or Clinton specifically are unlikely to show up to caucus in significant numbers.

Regarding the percentage: Starting with my table above (numbers as of Wednesday morning), if Clinton averaged 86% she'd get 163 of the 189, for a total of 1608; Obama would get 26 of them, for a total of 1626. He'd still be ahead by 18 pledged delegates. She would need to average 92% to end up ahead of him.

It's changed even more in his favor since then, due to Edwards' endorsement. 8 of Edwards' pledged delegates have already declared for Obama, and it's likely the rest (or most of them) will too.