I flew twice with Jet2 recently, sitting in the overwing exit row. Cabin crew did no personalised exit row briefing on either sector, and on one occasion failed to check for/clear obstructing baggage prior to landing.
Didn't see one other passenger read the safety card. The cabin crew struggled to get some passengers to stop chatting during the briefing (to their credit they tried)
In my experience bmi baby crew routinely did the overwing briefing, and would pause the safety PA if passengers were obviously not paying attention.
The quality of the PA system in some of the classic 737s leaves a lot to be desired, which doesn't help.