Ted explains to Kevin that Robin and Barney have researched many of the women he dated in the past and ruined the relationships by revealing unappealing background information on them.
While Kevin's assessment appears to be true, it causes a rift between him and Robin, which he attempts to make up for by offering to paint the rest of the room by himself.
Despite initial attempts to resist everyone's insistence that he should look her up on the Internet, he gives in and learns that she is extremely accomplished, highly altruistic, and very wealthy.
Ted becomes nervous and Janet leaves him, recognizing that his sudden change in behavior means that he has learned about all her achievements and he has become intimidated, as has happened with all her previous dating encounters.
Mentioning such instances as that "Kal Penn's line delivery feels very sitcom-y, and I don't know if we should blame him or the writing.