Startled as she is by the sudden grab of her hand, Sakura schools herself into moving forward instead of engaging and breaking contact. It isn't a threatening situation, and her surprise carries an edge of amusement. She puts on speed, keeping pace with Sara with relative ease, pack or no.

"I don't think it stops early!"

Buses might wait and stop again later, but it seems unlikely to Sakura it'll pull over earlier simply due to enthusiasm, but her thoughts reach a similar conclusion to Sara's. There won't be a great degree of difference between seats, no matter if they board early or late.