i'd believe it.....keep in mind that the whole chase has been going on for a while now, and its also expected that the journey from the leaf village to the sound village would be not much more than a day if oro expected sasuke to arrive so soon, although i cant remember if sand is neighboring the leaf as well......

but also remember how fast gaara's group made it through 2nd exam? even though kiba's team had both scrolls and was at the same place gaara was when he had both scrolls, gaara's group still managed to get to the tower like, 8-12 hours before kiba did