These developers hit a wall quickly, and have to work harder (or just write poorly thought-out/designed code) over time. That does not mean they are less capable than classicly trained CS programmers; it just means they have to overcome certain learning curves at a steeper incline. Saying this tho - personality, drive, etc makes a huge difference and overshadows this argument. Want to know how to optimize your website for a high-latency 3G mobile connection? I bet that having eaten some TCP/IP 7 layer burrito will help you in some way.