Not entirely true. Not banging on SWA crews at all. You guys are absolutely fantastic and I've never had a bad jumpseat experience on Southwest, both in dealing with your agents and with actual crews.
However, I have heard from a few co-workers that they were quite militant in enforcing the 2 jumpseater only rule for XJT in ONT. I think both companies were successful in getting it changed, but it was a rough go for a little while.
I have used the WN jumpseat on many occasions and have always been treated exceptionally well by the gate agents, drivers, and F/A's alike. WN even has a non-rev listing line which will allow off-line jumpseaters to receive a record locator prior to arriving at the gate which makes the process even quicker.
Thank you WN employees for setting the standard on how jumpseating is to be accomplished.