Maybe. Apparently today's testimony was pretty wild.* Towards the end, Senator Lugar, the committee chair said, "This may be the most controversial nomination President Bush has made.... They [the Bush administration] will find another ambassador in the event this one is not satisfying."
That doesn't sound like a vote of confidence, but I don't really know what's going on.
* e.g., a GOP appointee testified, in essence, that Bolton lied yesterday when he said he didn't try to have an analyst fired.