Every now and then I go back to my roots, as far as what I listed to, so several years ago, I set out to fill in the gaps of my Clapton music collection, acquiring probably everything (CDs and videos) there is to be had from the man himself. For a while I listened heavily to some of his 70s stuff, which many people dismissed as "no value added" work. Anyway, at some point I began revisiting all of the Cream recordings and recongnized that, in addition to being reminded that Clapton's vibrato is probably about as cool as there has ever been, some of those early tones are very similar to what our beloved RF has gone for and achieved with his various Dumbles through the years.
So, back in 1966 Clapton cut "Spoonful" in "Fresh Cream" and, to me, it sounds like what a Dumble Bluesmaster -- may folks' favorite ODS flavor -- eventually repeated. Going further out on a limb, a number of licks that RF adopted into his playing, especially since the 90s, sound to me like a nod to Slowhand.
I'm not sure if anyone has any thoughts along these lines, but the notion that the evolution of the ODS sound stemmed from "trying to come up with an amp that sounded like RF" (paraphrasing Dumble and the ODS) seems to be not such a clear proposition after all these years.
Cheers,
Gil