Fair points, and well argued, indeed.
Ritalin being speed - your post, followed by Wikipedia, just trumped all the people I ever met who were on Ritalin and told me it was chemically equivalent to amphetamine. I stand corrected.
Scientific basis - again, you are correct to ask, and again, only personal experience of both illegal speed users and their families, and people and their families of those taking Ritalin.
Thank you. Accepting that one has been misinformed or that one's statement does not constitute proof of something is the very basis of scientific discipline and rigour, and I can see now how I tripped up and pushed my opinion and those particular experiences a little too hard! Thanks.
Karma Bonus forfeited for obvious reasons, this post deserves nothing.