Difficult to say, they seem to have a different methodology to most teams (and definitely to RB) except for AM. There appears to be a fairly significant gap at the leading edge of the second element (the main element looks fairly portly), almost as though they are trying to tune the interaction between two separate elements (as opposed to using a twin element wing as a single, powerful, entity); no doubt this is all to do with both balance and tuning the DRS for maximum effect (a bigger ‘static’ slot gap will allow a bigger ‘activated’ slot gap. The portly lower (‘main’) will still generate a decent amount of downforce with the DRS open.
Since the teams have moved to two very similar sized elements (rather than the classic main and secondary elements), the behaviour is NOT exactly as with the classic structure.
Perspective - Understanding that sometimes the truths we cling to depend greatly on our own point of view.