While this is part and parcel of a plan to waive rescreening for a select segment of non-Schengen-originating passengers, and to speed up things for some transit passengers in some ways, and to reduce screening costs -- the variance in times and the length of the longest lines at AMS will almost certainly increase as a result of a greater shift to more centralization of screening checkpoints. Overall, the time to process any given passenger transiting AMS should drop, but that doesn't mean it will happen; nor does it mean that it will happen without resulting in greater variance in times and/or without longer lines.

As it is, with the increased rudeness of AMS passport control, the longer taxi times after touchdown at AMS, the crazy rush at AMS even on a Sunday morning, for me AMS has rather quickly gone from being one of my favorite transit airports in Europe to being an airport I no longer fancy and sometime even actively try to avoid. Centralized transit screening for non-Schengen to non-Schengen flights is going to mess things up for some passengers, more so for some routes and times than for other routes and times.