Caveat emptor: the early returns are not always indicative of the final outcome in these things, since the early ones often are the smaller precincts where, logically, the Tea Party has stronger roots.
If this holds, however… it will show that the Tea Party is far from dead-- again. There are still, however, major obstacles. They have to figure out how to effectively challenge the likes of McConnell and Graham, professional politicians, even if they see it coming. It's clear that Cantor did not see Dave Brat as a threat, whereas McConnell went to extreme lengths to neuter Bevin and Graham has cut off as many potential challengers as he could.