I'm sure they do, but the flaws in the database are very noticeable to the observant fan. I haven't gotten around to buying FM12 yet, but in FM11 they got a lot of big things wrong: Philipp Lahm is rated as a natural right-back even though he's a natural left-back, Gareth Bale's pace is underrated, Lionel Messi is rated almost as a pure right winger even though he plays effectively in a more central role, Sergio Busquets is underrated (Sergio Busquets is always underrated though), and a lot of wingers are very underrated playing in inverted positions compared to their real-life counterparts.