IMHO - As with other artificial surfaces Turfway, Presque Isle, Golden Gate, etc, The bias that I've noticed is for runners coming from off the pace.
The Tappeta surface is playing a lot like turf racing. It takes a very fit horse to win on the lead.
So something for everybody. The lightly built deerlike runners have the old dirt track to skip over blazing on the front end creating leads nobody can make up.
The heavier built strong individual's stamina makes a good stretch run necessary and exciting on the low bounce tiring carpet-like surface.
Those with an affinity for turf now have two choices.
I think it is a positive addition once one figures out a strategy to determine what surface the race will be run on?