I have to say, from the writing alone Chris Russo sounds a lot more confidence inspiring than the POF people. That long rambling blog post by POF did not come across as very professional.
The Russo side does sound "insecure", as he admits himself. Presumably they have not been in business for very long. But that is not the same as infantile, it's just inexperienced.
He was probably trying to communicate that he was looking for a consulting position after finding the exploit trying to be helpful