Should a person that is just a poolee (new recruit) insult other branches just yet?

Sure but only to other poolees.

(Grins knowingly)

Ok-here's the deal; inter-service rivalry comes in two forms-The first is a healthy, competitive attitude that inspires pride in one's own service, and maintains the individual and unique cultures of each, leading to a broad range of abilities, and a well-balanced force where excellence is valued.

The second is like a bunch of kids measuring certain parts of their anatomy-it really doesn't matter if at the end, everyone goes home to the same "deal" they had before (that's the polite version).

The sooner a service member figures out that whether one's a space shuttle door gunner...or a file clerk...it's all about their individual drive, interest and competencies (not to mention fate), the better.

It's best to keep quiet until you have some personal experience under your belt.