I had my surgery yesterday, and it looks like I really dodged a bullet. The tear was much smaller than what they saw on the MRI, and they were able to just clean up some loose stuff and send me on my way. I should be back to normal on this shoulder in a couple of weeks, not months. Now it's on to the right shoulder. Yay!
Thank you again Brute and DoldGuy for all the advice. I felt very comfortable going in to the surgery thanks to you guys.