From the Ben Cartlidge twitter feed (linked on the languagelog thread), I thought this was an interesting comment:
"I.e. there are criteria about what Proto-Romance should, or should not, look like. Quite complex criteria at that. No-one would reconstruct Proto-Romance without any unaspirated stops, or without any pronouns, or with intact Latin nominatives singular."
"I.e. there are criteria about what Proto-Romance should, or should not, look like. Quite complex criteria at that. No-one would reconstruct Proto-Romance without any unaspirated stops, or without any pronouns, or with intact Latin nominatives singular."

