Hey, while you were saying "good that you did it", I fought the camelCase convention!
That's one point for you -- however the "good that you did it" was targeted at the "I change the naming convention", not the camelCase.
Because the default_one seems to be awful enough that almost nobody likes it. Probably because people consider all the underscores less readable, especially in combination with operators.
Strange, because underscores are easier on the eyes than helloJavaWorld (compare with hello_java_world, I can better separate the words). But well, in the end it's just personal taste.
I'm fine with the conventions -- at least they're consistent, that's important.