I think it's hard to say he is completely not at fault, both of these guys said that UVA was a terrible place for quarterbacks to be last year.
London completely mismanaged the qb situation last year by committing to neither player and pulling them every time they ha a bad series.
London may be recruiting better than Groh, but have yet to see that develop into anything on the field. I don't think he is on a hot seat yet, but he could be if this year is similar to last year.