Let's be honest here. If you have a group of friends on the same Teamspeak channel starting to divide the jets of the next map among themselves before the previous round even concluded, some of the claimants not even being on the server yet, you know yourself very well that the chances are not entirely fair.
We are talking about atleast 3-5 friends trying to create the CAS squad at the same moment, who are so good at this, they basically trained themselves to press ENTER at the exact moment to create the CAS squad before anyone else.
This leaves anyone else maybe with a 5% chance to get the CAS squad themselves.
Then if you join their CAS squad and ask for a jet since there are not enough people there atm, you will hear they have friends joining later. Those friends then only arrive in the squad in the last minute before the jets spawn, either coming from the Tank/APC squad or even from a different server.
How do i know this? It has been done to me many times and i also did it many times myself.

So i am not saying people who do it are bad, but please don't try to claim the chances are equal and fair.
It is totally understandable why some people might get angry at you for this, once someone actually took a LAT and destroyed my jet because i did it to him lol.