Yes, as mentioned upthread there is a preferred "line" it is over to the left of the entrance of the A/B concourse security line. There is also a sign for "crews" to use this line - except for early AM flights most crews turn at SJU so not many crew members at security I guess. I had to ask to be let in the other day because it was roped off.

Pretty sure that the 333 birds have 20 seats after the conversion, not 28. Still more than all other AC in the system (767 have 18).

Ag inspection is by the check in counter - I didn't need this with carry ons. Doesn't make sense why carry ons would be excluded.

Expect the normal problems with infrequent travelers, gate lice, vacationers with too many suitcases etc. Other than that pretty much identical to an airport in the 48.