I also think that he isn’t out there as much as you’d expect. Most people don’t really have any impression of him or think he’s OK. The lousy timing of the convention with the hurricane hurt more than most people will admit. That mushy “undecided” crowd at least knows Obama and generally like him. They won’t chance a vote on someone they don’t really know.
...which is both sad and scary as they basing their vote on personal likability and not on who is better for the nation.
Well, how many mass rallies has Mitt actually done? The answer is very few, and here's the reason why (from back in February):
Romney lays out economic vision - in mostly empty stadium
Mitt Romney Rents Out Football Stadium for Speech to Handful of People
After this, Team Romney made a conscious decision to NOT engage with the mass public.