I don't believe that democrats are smarter than republicans, or the other way around. In the case of conservatism, the simplest solutions are often correct. A conservative may limit his/her words, and not write lengthy books that make up a single law, etc.
democrats are, however, better [organized]. They are more 'social' thus better liked among the many, and can go on and on utilizing verbage that can make anything 'sound' good or right.
These are generalizations which of course do have exceptions.
"What if the American people learn the truth" - Ron Paul