Does a 240hz monitor really increase skill?

I'm asking for your experience...

I recently watched a few videos on how it's better for competitive gaming (it is by far)

So, I got a 240hz monitor - Dell 24270HF. At first I was hitting nutty shots and frags but after sometime my eyes felt more strained and found it hard to almost refresh my eyes and attention to how quickly the monitor was refreshing information.

I went straight from 60hz --> 240hz maybe I'm just not used to it yet. Anyhow, if any of you have a 240hz monitor do you find it more straining on your eyes after a long time and has your skill level/rank gone up since you have had your 240hz monitor?

Let me know <3

EDIT: Gramatical error.