No, I don't think the iPhone 7 Plus (or 7 or 6S/6S plus) are slow phones but I really hate how slow the animations are, one thing though, you CAN'T say that the S8/S8 + are slow either or the usual claims that because it's a Samsung or Android it will get slow later. I'm still waiting for one of mine to get that way, I used the S7 edge for over a year and it was working as the first day, obviously the battery, as in any other phone wasn't holding its charge like when it was brand new. The same happened with the Note 5 that was used for about 14 months, first by me and then by my daughter. One thing I always do, even with the Iphones is a weekly reboot, that's it.