My point is, over the years shopping in carrier stores, and the few that sold Nexus phones, I recall the Nexus being plane Jane, but always so buttery smooth and fast in the store, and the hot phone of the year, be it Samsung or HTC, or LG always had some micro stutter, or slight lag.
Back in the Nexus-S days that Nexus was smoooooth, and the other Android phone's not so much.
Same with the Motorola Nexus 6, on display that Moto 6 was so hot butter smooth and fast, and the current other phones not even close to the same.
And now the Pixel, go to Verizon, play with the Pixel, then play with the S7 Edge or LG G5 or whatever, no other phone in the store seems to perform as warp speed fast, but also just so smooth and lag free.