A true sweep load would have the right elbow starting to cock at the beginning of the backstroke....Els is not doing that....I'm looking at a picture of Els in his book "How to Build a Classic Golf Swing" and his hands are not set at the half stroke position (with a 2 iron). Text in the book has Els saying..."wrists hinge naturally"....I would consider that comment to indicate that Els is snap loading or the very least random loading....Ernie is going away from the ball with an extensor action takeaway (full sweep has the loading starting at the beginning of the backstroke)....the real arguement should be whether or not it's a snap load or random load....
I use snap loading....with some clubs, especially with the short clubs, it may appear to look like sweep loading but I can feel the left wrist complete it's cocking motion at the end assembly point.