Speed reading doesn't really exist; it's just skimming. Even the fastest reader in the world will admit they lose details and don't enjoy it as much. You might be interested in checking this video out.
I commute to work on the train (~ 40 minutes each way) and spend a lot of time reading after work or on the weekends. I don't think I speed read, but not sure what the threshold is for that.
https://vimeo.com/331908835