I came from an Air 1, not the 2. I knew it was getting old, but I didn't realize how much iPads had advanced. Feels like only yesterday that I ditched the obese iPad 3 for a slick Air. I thought "eh, I can put up with some laggy graphics here and there, or the RAM shortage that makes Safari forget web pages if I hop over to another app for a second". It was only after unboxing the Pro 10.5 that the full impact hit me. I had been stuck with a 386 in the age of Pentium-M.
The only delays you'll experience on a 2017 iPad Pro will be due to the internet failing to feed it content fast enough. Everything that relies on the internals alone is instantaneous and appears the split second you tap on it, smooth as silk. In fact, this morning my 10.5" actually invented time travel. A push notification came up, and in the upper right corner where the timestamp is, it said (in Swedish) "Om 1 m" (In 1 minute) instead of the usual "nu" (now)!
(Yeah, I realize it's just a glitch/bug... it was still hilarious to see it).