Really John? And where's/what's your proof of that?
I submit that the "see CTEL, calculate pivot, do pivot" is too time-consuming for such a dynamic shot as a wing shot. First, your CTEL is moving even if the object ball is rolling 100% away from you (versus off to an angle). Think about this for a second, before engaging fingers to keyboard in defense, ok? As that object ball gets smaller and smaller, the CTEL is "seemingly" pivoting closer and closer to the object ball's center (even though it technically isn't -- it's always tangent to the object ball's edge, but the gradually decreasing size of the object ball causes the CTEL to proportionately move inwards). The only time this isn't true, is if the person tossing the object ball down the table, did so in such an incredibly accurate fashion so as to line the final fire control solution line (the post-pivot line) as being straight down the table no matter the distance of the cue ball, in which case, one is ignoring the CTEL altogether and focusing instead on that final post-pivot fire control solution line.
With ghostball, the center of the ghost ball is the center of the ghostball. It doesn't change, no pivot needed. So if one tosses an object ball 100% away from him/her (which is not as difficult as it may seem -- watch the Earl Strickland video in one of my previous posts in this thread), no matter the distance of the object ball, the ghost ball center contacting that object ball in the correct spot is always a straight line away from you -- you don't have to pivot your cue.
And admittedly, wing shots are a PRACTICED shot. You have to practice these, to get the timing down. I once read an article about Earl, specifically about wing shots, and Earl was inspired by stories of the great Ralph Greenleaf not only being able to nail consecutive wing shots (like the rapid-fire series that Earl demonstrated in the video), but Ralph could do wing shot combinations! (Or "combination shots on the wing," or "combination wing shots" as some refer to them -- roll two balls down table, and shoot the cue ball into one of the balls to have it combinate into the second ball to pocket that second ball.) In this article, Earl explained how he uses the wing shot as a practice technique to instantly sight the solution angle to pocket the ball, to "see" the ghostball and shoot the cue ball into its space. In other words, he's training his mind to see the solution QUICKER and more clearly. Sounds like a great practice technique to me!
-Sean