I believe that not having a degree shouldn't deter anyone from going into a programming career. However, it's inaccurate to say that going through DBC will make you successful in the industry. Even with the wide range of topics covered in DBC, in ten weeks there's no way you can acquire the depth or span of knowledge that people have coming out of a 4-year CS program.
Personally I'm having a hard time forming an opinion - DBC motivates you to learn interesting and practical things outside of a CS degree, yet doesn't that defeat the purpose of doing it on your own? Also what constitutes interesting/practical? Some might say compilers, algorithms, and optimizations. DBC trains you for a specific area but that is really a small subset of the whole.
Also, from knowing someone at DBC I'm pretty sure that they did ajax calls with jQuery, not actually creating the XMLHttpRequest object.