I meant contact details for them (the ones who think tubs feel faster), not for you!
al – I’m sure I could find some links, but it would take more effort than I can be bothered to put in. I used to spend a lot of time on rec.bicycle.science and latterly the hardcore bicycle science mailing list and also on the weight weenies forums, all places some very knowledgeable people hang out (eg the late Sheldon Brown, Jobst Brandt etc.) I’m pretty confident about my assertion based on results of studies I saw on there and elsewhere. Doubtless some German magazine did a proper test.
FWIW I have tubs on my TT wheels – Veloflex Records, not cheap but some of the fastest rolling road tubs you can get. I’m under no illusions that they’re faster rolling or more comfortable than clinchers I have on my other wheels, however as a package of deep carbon wheels and tubs they’re certainly faster – at the time I bought the wheels the only option for deep section aero wheels was tubs, if I was buying now my choice might be different (might – the tub wheels generally work out significantly lighter than clinchers).