Part of it also depends on what you are streaming from. So a Gen 1 Firestick is NOT going to give you the processing power and wireless sensitivity of a Roku Ultra.Make sure you watch some sports - especially something like football with lots of action on the screen - and make sure you don't see any compression artifacts. I've not tried all the services, but while my connection easily exceeds what's needed to stream HD at 60 FPS (several times over, in fact) I still haven't found a streaming service that wasn't visually degraded from cable.
I know I'm more sensitive to data compression artifacts than most, so it might not be an issue. Or these streaming services might have (rather drastically) improved.
And factoring in that many of these things are connected to quality. There is the quality and speed of one's internet, and then how good is the router and modem being used to disperse the internet to their streaming device (if you stream from an Xbox or Playstation then you can hardwire into your router or modem), and then how good is the device itself, how much processing power, how good is the receptivity? Then, finally, is the service itself and the various things that go along with streaming such video. Sling has done a pretty good job. I still notice some artifacting in the blacks but that's not a concern for our games. Otherwise it's a consistent 1080p at 60p.