Gradualism was still taught recently (and probably still is) and is certainly still believed by some. Evolutionism has an atrocious record when it comes to updating textbooks and curricula. Indeed, they historically have opposed updates as a matter of policy or reflex.

That evolutionists have been forced to partially concede catastrophism in no way makes it erroneous to debunk gradualism. It's never an error to debunk falsehood. Might as well call it erroneous to debunk the idea of an heliocentric universe.

It actually raises a double-negative situation. If it is wrong to say gradualism is wrong, that makes gradualism right. Hmmm. I hope I don't fall victim to the secret message.

Dark Matter + Dark Energy = Dark Truth

"We find that such evidence demonstrates that the ID argument is dependent upon setting a scientifically unreasonable burden of proof for the theory of evolution." - Judge Jones Kitzmiller case
http://www.talkreason.org/articles/Falsify.cfm

"To Compel A Man To Furnish Funds For The Propagation Of Ideas He Disbelieves And Abhors Is Sinful And Tyrannical." - Thomas Jefferson

"And can the liberties of a nation be thought secure when we have removed their only firm basis, a conviction in the minds of the people that these liberties are the gift of God? That they are not to be violated but with his wrath?" - Thomas Jefferson