[inaka]

My prediction: you will receive your Gamestop order back a solid month before you get your cards back if you mailed it in. It will take about a month before PSA even enters your personal order into their system.

Also, with the GameStop order, be sure to take lots of photos front/back of your cards. With the GameStop order, you won't get access to the pre-grading scans, and thus, be unable to have evidence when/if PSA damages your cards.