Heres my 2 cents worth. Yes the Bruce is one of the best for quick set. Just as good is the SPADE anchor. Sets just about each and everytime. And like he said, if you engine just quit and you are on a lee shore, you want it to set NOW !.....Plus the SPADE has a very good holding power relatively and one of the best reseting capabilities of anchors out there. (This info is based on various tests and Practical sailor test).
It is kind of a cross between a Bruce and a CQR in that its a plow but with a Concave face to the bottom (Like the Bruce) and not convex (like a CQR). So it "scoops" the bottom and doesn''t plow it like a CQR.
ps.....so far I have been very happy with it. Left it in Block Island and a storm blew thru and I was on land ....I only had 4 to 1 scope (I do have an ''upsided'' anchor which is a 44lb model with a medium weight 36 foot sailboat....The rode had 15 feet of chain & 18 lb sentinel) The anchor held fine and my wind meter said that the winds maxed at 41 knots !