What a fascinating concept!  I've always enjoyed alternate universe stories and this one is shaping up very nicely.  I like that we get to see into Draco's head, as it were, and I can hardly wait to see how the changed you made to launch this story affect the background events from canon.   

And I like how you didn'y make the potions class be a verbatim repeat of the original, like so many stories do.  I loved the varied answer's to Professor Snape's questions and I could just hear Alan Rickman's voice in my head when he answered Harry's query about how one got a beozar out of a goat's stomach. :-)

I look forward to future installments!  Happy writing!