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I have not used Speedy but I can tell you that NoSlowAnimations did not work properly for me on iOS 10.2. It did decrease the animations but somehow it increased the loading time of apps, even the stock Apple ones like phone and messages. I ended up removing it because it wasn't really doing much.
 
I'm using NoSlowAnimations on the following devices: (all were virgin, completely clean devices and all have beta6 and all are 10.2):

- iPhone 5s
- iPhone 6s
- iPhone 6s+
- iPad Pro 12.9"

Absolutely no problems here. No slow app loading.
 
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