I think it's easy to dissect. It was a really impressive visit but that doesn't mean that KU is the best place for his son. I also don't think that implies that it's not either, just that they have to make a decision.
Here's another quote from Lamb himself:
Lamb, a 6-4 senior shooting guard from Oak Hill Academy in Mouth of Wilson, Va., also was awed by the full house.
“The highlight (of visit) was when I walked out with the others (recruits) and the crowd was cheering and gave us a standing ovation. I’ve never had anything like that happen to me,” Lamb said.
“It was a cool visit. I liked meeting the players, coaches and seeing the campus. Coach Self is cool. He’s real. He tells you the truth.”