If an attacking player has won the ruck, the attacker will get a quick ptb, if the defender has won the ruck he will be rewarded with longer time to release.
So yes
Surrender and dominant tackles are different. You will hear surrender more than dominant.
There is also the attempt to regain there feet
Watch london players! Even if they win the ruck, eg moving fwd landing on knees and elbows it’s very unusual they try to get to there feet quick.
The game against Wigan, it was a definite ploy from London to push the boundaries to test the ref, soon as they got the warning it stopped. Inexperience with some london players is obvious at times, they don’t even try to stand! If they did they force the refs hand.
Classic example was leeds game in the 8s Dixon made 40 mtrs, got tackled, defender held on, why no penalty? Dixon made no attempt, if he had, chances are that would have been penalty and yellow card