I live about 50 minutes from the port. For a 10:30 PAT, we leave home between 9:30-9:45 and get there about that time. We have family that drops us off. The entire process has always been a breeze. Typically, we get through security with no wait, check in with little to no wait, and boarding has typically already started by then so we walk right on due to our PAT. Only once did we wait about 20-25 minutes for our boarding number to be called. We had no problems finding a seat then.
IMHO, I wouldn't stress getting to the port before 10:30, especially if that's not your PAT. We eat lunch as soon as we board to get ahead of the crowd. We have found that by 12-12:30 Cabanas is packed.
It's this process I'm most curious to experience on the Oasis this June to compare. I'm hoping it will be just as easy.