Yeah, it has credence in an "I guess anything's possible" sort of way and, of course, the Republicans will make this priority number one.
But, come November, if costs haven't soared, people are still getting treated (with some people that previously were boxed out of insurance now starting to get it) and with no stories of "death panels" unplugging Grandma, the chances of this being the wedge issue for enough voters to overturn the huge advantage in seats that the Democrats currently enjoy is not too far above zero.
Now, if those employment numbers lose their recent inklings of peppiness...