Yes - I saw quite a few runners getting stickers on their bibs at the Runner Relations booth while I was waiting in line to pay for my merch. I think with the recent rash in "hacked" PoT submissions that rD is trying to rectify the issue as best they can. It's also a safety thing - it's not safe for an A corral runner to have to blast from the back of the pack ... not safe for the runner or the others around them - I'm thinking
@crewmatt may have been a runner that was improperly corralled for this race as well?
Anyway. During the delay in the Fieldhouse, I was chatting with a gal in the restroom. Her bib number was in the 14000s, but she had an A sticker over her original corral letter. Not to judge a book by its cover, but I had to do a double-take because I thought she was someone famous ... she was just in AMAZING shape.
Also, and just my dos pesos - I think with the sheer number of deferrals and late registrations as people dropped from charities and TAs (there were bibs being purchased via TA as late as Oct. 6th-ish) that rD was doing its best to accommodate runners legally registering bibs that may not have had a chance to submit PoT and clearly had a reason to be in an early corral.