Here's an excerpt from a recent article, talking about Harbaugh's QB evaluation ability:
(Baalke speaking): ". . . I've had a chance to watch him interact at practices with the quarterback and he's just got it. I don't think you can teach it. Some guys just have it. . . . He developed one, Josh Johnson, down in San Diego. Obviously, he has a great one (Andrew Luck) at Stanford." The 49ers learned of pre-draft reports Harbaugh wrote while with the Raiders in 2002 and '03. His reports were "spot on," according to a source. Harbaugh placed a second-round grade on Tony Romo, who went undrafted. He had a higher grade on Jaguars fourth-round draft pick David Garrard, who has been a solid NFL starter the past four seasons. Harbaugh did not have a good grade on Joey Harrington, the third overall pick of the Lions in 2002.
http://www.csnbayarea.com/01/08/11/49ers-QA-Front-office-changes-ahead/landing_niners.html?full_args=01/08/11/49ers-QA-Front-office-changes-ahead/landing_niners&blockID=387402&feedID=5936 - Excerpt from bottom of article.