This is almost certainly a bogus list. There is an Internet tradition of making lists of Dumb Quotes, attributing them to your favorite political enemy, then sending them out to your email buddies. At this moment I'm quite sure that there are thousands of Bush-haters who are convinced that Bush said all of these things.
In truth, I believe some of these quotes (maybe not all) can be traced to Quayle. See the "urban legends" website (snopes.com)....
Not that any of this makes Gore any smarter, of course. He's still an idiot. He just probably didn't say these particular dumb things. He's said plenty of other dumb things though.
You are right. Every one of those that I recognize is a Quayle quote, with necessary items changed (eg, Republicans -> Democrats).
Here is a web site with real Algore funny quotes. http://www.gargaro.com/algore.html
Interesting that the media let these slide unlike Quayle's flubs.
My favorite Algore quote....
"A zebra does not change its spots." - Al Gore, attacking President George Bush in 1992.