No WMI, just a big intercooler. Quite normal for IAT to drop for a short while after opening the throttle.. if mine were a 4th gear pull, the profile would look more similar to yours.
Injectors are not stock
Has yours been on a dyno? Pretty similar in terms of acceleration (yeah, I know that's a crap comparson if we're not logging on the same piece of tarmac in the same conditions)