I have personally confirmed with a show publicist that One Tree Hill does have a 22-episode order for season eight.
Suspicions arose yesterday after The Futon Critic, a generally reliable and respected site, reported they received confirmation from CW entertainment president Dawn Ostroff after yesterday’s TCA executive session that the order had been increased from 12/13 to the full-season amount of 22.
With no other outlets reporting, and Sophia Bush (Brooke, One Tree Hill) as well as the official One Tree Hill Twitter account seemingly confused by this news, I sought out confirmation (last night, actually) and received it today.