Hmmm... Well first off.. I have learned how to type about 3 times faster then i used to type, and i was already a fast typer in my mind to begin with.
Second off, writing papers has become a lot easier. now that i am able to write faster, i can also write more quality and thorough papers.
Also I feel my grammar, and punctuation as become a lot better.
Overall HUbpages, on top of making money, has been a great tool for me.