The only thing I'm going to say is that Stan's comments put a few nails in the coffin of the "Dellortos are better than Webers" thing.
I think the way your car runs says more about the guy tuning it than the built in superiority of one carb-type or another. I also think (and said) that at least 50% of the awesomeness is your ignition tune-- you've clearly taken this way, way further than almost anybody else.
The whole DRLA vs. IDF thing really seems to matter only to a very few people. Dellortos haven't been built for many, many years, and so the point is moot for most of us. Regardless-- the carbs are nearly identical for most practical purposes. They are just two ways to get to the same point, and the whole world is set up for IDFs. Every Dellorto out there is at least 35 years old.
For the vast majority of owners really struggling with plugged idle jets, the ability to access the jets from the top of the carbs (rather than from the outboard sides) in a very compact engine compartment is pretty darned nice. It's probably no more than that. The idle jet access isn't an issue for Spyder guys-- but it is for pan-based Speedster guys. "Better" means different things to different people.
It's clear that you can make your IDFs perform >= any Dellorto equipped car I've ever driven, but I suspect you could do the same for Dellortos as you can with IDFs. As I said, "I think this says more about the guy tuning the car than the built in superiority of one thing or another."