I think this is a wrong question. The right question is Does it matter who gets elected president? and the answer is NO. US elections are a form of participatory rotual. designed to make citizen feel good, but otherwise inconsequential - just as in the x-USSR.
The reason is quite simple - what matters is not how flies get into honey, but whether you can get them out. In a parliamentary democracy, governments are formed by coalition of smaller parties, neither of which has the majority. These parties are more accountable to their constituents, because under a proportional representation system, fewer votes automatatically translate into lower share of seats in the parliament. So the coalition government is more dependent on the parties that form it, which in turn are more dependent on popular vote.
In the US pseudo-democracy - the people who call themselves the government are for all practical purposes immune from any public accountablity once they get into their offices. Clinton's survivial of the impeachment is a case in point. Just like in the good old USSR.
So why bother voting? Why fooling ourselves that it matters? A more productive political strategy is to organize a lobby to "invest in America" and simply buy politicians.
wojtek