Take a look at Breguet's silicon Detent Escapement mounted in La Tradition movement (1:36 - 3:41). This film comes from official Breguet YouTube channel.
Is Breguet's 'new' detent escapement somewhat similar to the co-axial technology escapement (or maybe I read somewhere that the co-axial is a type of detent escapement)? That gearing looks similar. And Swatch owns Breguet and Omega and uses co-axial...anyway, just wondering! Maybe I've been staring at the see-through back of my Seamaster with a 2500C too much! Thanks for the great video, very interesting and awesome. =:^D
They are totally different. Co-Axial is double-impulse escapement, where one impulse is direct and one impulse is indirect. Breguet's construction is single-impulse direct escapement, similar to Audemars Piguet Escapement and Urban Jurgensen Detent Escapement. Detent escapement is regarded as one which deliver the greatest timekeeping accuracy.
I had heard that Dr. George Daniels considers the detent escapement to be the best and most elegant of all escapements, but the co-axial uses less lube and is more accurate (?). I'll have to break out my notes on escapements and re-read. Fascinating! =:^D
Is a sensitivity to shock. If you hit it at the wrong time in the cycle, it can unlock the escapement wheel entirely and skip ahead. I think the issue is one of direction, in a lever or a coaxial, the locking can happen with the escapement lever moving in either direction, but in a detente, move it too far in one direction and it unlocks entirely.