Everybody, including mere mortals like you and me (or perhaps not you, but I'm sure aware of my own mortality), shall be able to win a game of Starcraft II online. At least we should have a "chance". Which in my world means "not a chance in hell". Either way, the matchmaking didn't really work all that well during the beta, but that is something that Blizzard is looking hard at fixing.
"There were some balancing issues when we first started the beta. But our matchmaking has improved greatly since then. The ultimate goal is for 50/50 matching - all players should have a chance of winning in every game they play. We know that there are people out there who want to win all the time, but that's really no fun," lead producer Chris Sigaty told IGN. I'm holding you to that, Chris! If it doesn't work, I will challenge you to a battle and expect you to fold.