HMMmmm - that's very interesting, and makes me sorta wonder if what's going on is being missed by some Smarty owners due to driving style, and interpreting the "surge" as the intended aggressive acceleration characteristic of the Smarty programming?
In testing my own Smarty, set to #8 with my Comp set on it's lowest 1x1 setting, my manual equipped truck didn't demonstrate the greatly enhanced "lunge" way down lower in the RPM range other owners rave about - but DID abruptly and aggressively leap ahead when the RPM hit about 1800 RPM - along with boost that nearly instantly went well over 30 PSI.
No "lag" or dead spots in acceleration, mind you - nor any real complaint - but definitely what some might describe as an abrupt surge of power and acceleration at the 1800 RPM mark.
That's as close as I have noted to any "surge" with my setup.