of preboarders that stroll on?
Just arrived from IAD, and there were 7 wheelchairs and 8 ambulatory. When we arrived, they called for 2 wheelchairs, the Southwest Miracle works again!
Since the OAK flights (in my experience) seem to be one of the most reliably high with preboard count, I'm going to go with:
7 wheelchairs
12 ambulatory
4 velour matching tracksuits
3 sets fuzzy slippers