Some pin poppage (my first experience with grading pins)

JHS5120

This was my first ever experience grading pins, and I'm pleasantly surprised by the results. Has anyone here submitted pins to PSA before? These pins all had some extent of rust on the back (some more than others) and I would have thought it would kill the grade. Actually, I'm surprised they all graded EX. I'm sure some are EX and maybe some better/worse, but they are definitely not all the same condition. Either way, I'm a pretty happy camper.

1 1 22648598 EXCELLENT 5 1930 CRACKER JACK PINS LOU GEHRIG Card
2 1 22648599 EXCELLENT 5 1930 CRACKER JACK PINS VERNON GOMEZ Card
3 1 22648600 EXCELLENT 5 1930 CRACKER JACK PINS TONY LAZZERI Card
4 1 22648601 EXCELLENT 5 1956 TOPPS PINS HECTOR LOPEZ Card Short print
5 1 22648602 EXCELLENT 5 1956 TOPPS PINS CHUCK STOBBS Card Short print

bobbyw8469

I have submitted pins/coins before. I have no idea what to look for.