It seems just about everyone I've seen this year in high school has added a pistol formation to the repetoire.
Klein Collins used it most effectively of the teams I've seen in person. I've also seen La Porte using it extensively on video.
After watching Nevada recently, you wondered how long it would take for this to trickle down to the high school level. It appears we have our answer this year, but it will be interesting to see how many programs start running it as their base offense like La Porte has done this year.
I really enjoy watching everything Nevada does from the varying depths of the RB to the misdirection elements when the offset back is added. When you watch other teams operate from the pistol, the development looks pretty slow and deliberate. Nevada's action all looks smooth as butter. They've written the book on the thing.