Yes, the CR route really is the quickest route. The monorail can be quicker if....1. there isn't a huge crowd ahead of you at the platform 2. you don't get caught in a crush of people trying to get from the buses to the park entrance or a crush of people leaving the park 3. the monorail is there and you get on just before it closes it's doors.
The CR is the next stop for the monorail at the MK. But if you get stuck in a crowd or the monorail is jammed, it is a lot faster to walk to the CR. Besides, then you have to get off the monorail at the CR, join the throng of people that are squeezed into the narrow walkway to the tiny, narrow escalator and then hop on the elevator to get to the CR. And, I believe you have to stop someplace to check in for the CG before heading upstairs. So, you may as well just walk via the path, it's an easy pleasant walk and check in for CG and then take the elevator. Yum!!!!!