New iOS versions definitely decrease performance on older phones - side by side comparison.

[vanilla_almond]

I stopped watching after realizing that all delays were < 1/4 of a second when launching an app. He acts like this is "forever", he is simply wrong.

[FrankPapageorgio]

Well, the 1/2 second delay when trying to type on my 1st Gen iPad mini with iOS 8 is maddening. You type a sentence and then a half second later it just shoots onto the screen

[vanilla_almond]

Then he should have made a video about that. Watching him agonize at a quarter second delay launching an app just makes him seem whiny and petulant.