I need more information to understand what you're saying, because it's open to interpretation.
If 2OA is a player that consistently scores 50-60 points and hits 70 once or twice, I think there'd be reason for a little bit of disappointment. Not severe disappointment, but I would say that's a mediocre performance for 20A.
If 20A is a player that's scoring 68-72 points every season, you can't be disappointed with that. Is it like getting Datsyuk in the late 6th round? No, but it also isn't anywhere close to a bust.