This is just my experience, but I know that many people weren't enthused by the fact that computer science classes were absolutely packed with people. Obviously

This is just my experience, but I know that many people weren't enthused by the fact that computer science classes were absolutely packed with people. Obviously this depends on the school, but if class sizes of 200+ persist even after the first few intro courses, it'll whittle down the number of people pursing the major for a variety of reasons, such as poorer quality instruction and the inability of those who need a bit of help to get it as the line outside the TA's office is in the dozens.