Which could mean that they think Romney will make a better President for the country which is, after all, good for business.
Which could mean they think Romney is going to beat Obama.
Which could mean they are repudiating Obama's crony capitalism.
Which could mean they think Obama is just incompetent.
Which could mean they are tired of giving money to an administration that demonizes them whenever they want to.
It doesnt have to mean what you think it does. It can mean a lot of things. It may not even mean what I think it does.