I'm fairly certain that would have stopped execution of the maintenance plan. But the best thing to do is check. Have you run the maintenance plan before? How long did it take then? How long did this one take? That can tell you right there. I assume you're scheduling this through SQL Agent? You can look at the history of the job and see what happened.
"The credit belongs to the man who is actually in the arena, whose face is marred by dust and sweat and blood"
- Theodore Roosevelt
Author of:
SQL Server Execution Plans
SQL Server Query Performance Tuning