To address the question posed in the title of this thread.... yes. The exact quote, as it originally appeared in The Legion Outpost # 4 is:
HA HA! I
KNEW IT!
Those that say I've got a bad memory owe me an apology.
In Bates' defense, it was over thirty years ago, there's always the possibility that he might have been misquoted (although I doubt it), and that period of Kirby's career was disappointing when compared to the days of the Stan and Jack team.
There was always something "off" about ETERNALS, as much as I love it (and still love it, for all of its wackiness). That thing was illustrated to me by the seven first preview pages of Neil Gaiman's latest take on the series.
The Gaiman take on ETERNALS begins with Ike Harris (Ikaris) speaking to Makkari, who has forgotten his origins as an Eternal.
"Pardon me, sir, but have you ever wondered about the origin of intelligent life on earth?"
And then he goes into the whole spiel about the Eternals and Deviants and the Space Gods and all that and Makkari slams the door on him, cursing him out as a "darn Scientologist." It was hilarious.
Right then and there I realized what was so "off" about ETERNALS: it was, pretty much in comics form, the beliefs of nearly every single suicide UFO cult. This is SCIENTOLOGY: THE MINISERIES as only Jack "King" Kirby could tell it!
I don't think that was unique to Keith's Superman work. All of his 1980s layouts can be a bit challenging.
As an artist, I have never really seen any work by Keith Giffen that I've really LIKED since that issue of MARVEL COMICS PRESENTS starring Woodgod.
And his current stuff is just appalling - he went from a competent Dave Cockrum clone to being someone that represents heads as jagged geometric shapes.