No, Americans do not really care much about James Comey's nomination, because who is running the CIA or the FBI is not a significant issue to most Americans. Americans trust that their leaders will select someone who is capable of the job. Who is selected does not change the daily life of most Americans, so they do not care about James Comey.
James Comey has been the Director of the Federal Bureau of Investigation since the summer of 2013. The only reason I know that is because I had to look up who he was, and I'm certain most other Americans would have to do the same. It wasn't exactly a big news story of the year, so I think it's safe to say that no one really cared all that much about Comey's nomination.