I'm a fan of Wonderboy but it's tough to predict the future. One one hand, Wonderboy was ahead on points. Specifically head punches. On the other hand, Pettis KO'd him with one good punch. So how do we know that Pettis wouldn't have landed a solid punch in the later rounds?
It's hard to say Pettis was outclassed since he won the fight. His strikes were effective. And even though he was behind on head strikes, the one good one he landed was all it took.
Let's think about it like football. Say one team got 3 interceptions and 4 sacks. But they scored zero touchdowns. The other team scores a touchdown. The other team wins. How can you say the other team was outclassed if they won?
Let's think of it like a race. 1000m. Wonderboy pulls ahead for most of the race. But Pettis catches up and reaches the finish line first. How can you say he was outclassed if he won?
Wonderboy had more effective striking for almost 2 rounds. Pettis, being the smaller fighter was keeping up pretty well. And most importantly, he finished the fight. I can't call that being outclassed. Maybe if the fight went on longer and Wonderboy racked up a landslide advantage in strikes I'd consider it outclassed. But based on stats, it wasn't a blow out.