Blanca is Jumbo all by herself. At 6'2" she is as quick as Milaysia Fulwiley and finishes as well at the rim.
Sarah is Jumbo. She moves with ultimate decisiveness and rebounds like an octopus.
Serah is Jumbo because she runs the floor better than any other players at her size, which is 6'4" officially, not 6'3".
Put that trio on the floor together and the team is Jumbo-er (i.e. quicker and stronger than any opponents). UCLA is bigger, but much slower. Texas is bigger and slower and not nearly as potent as scorers. SC is the closest to UConn's Jumbo-icity, with Joyce and Medina, and Agot if she's healthy.
Of course, team quickness (a key component of Jumb-itude) matters a lot more than individual quickness -- that's quickness in decision-making, i.e in passing, shooting, switching, outlet passes, etc. Last season's team demonstrated the importance of team quickness when they humbled UCLA and SC at every meeting. This season's team looks to be at least as quick... and therefore equally JUMBO.