Here is a perspective from Professor X. He fails a lot of students who maybe should have thought to do something other than college.
Money Quote (from Prof. X):
For I, who teach these low-level, must-pass, no-multiple-choice-test classes, am the one who ultimately delivers the news to those unfit for college: that they lack the most-basic skills and have no sense of the volume of work required; that they are in some cases barely literate; that they are so bereft of schemata, so dispossessed of contexts in which to place newly acquired knowledge, that every bit of information simply raises more questions. They are not ready for high school, some of them, much less for college.
Update: Some reaction here and here. Sober reactions, but no mention of tracking....