Hi Brian
I had a play with quite a few TV EPs including the Delos the other week when I visted Bintel and unfortunately I wouldn't classify either of the current 2 Delos Fls as small or even modest in size. They are roughly the size of the bigger Pans or a smallish ethos. The T6 Naglers strike me as intricate little marvels crammed solid full of metal and glass with the aim of being small but giving a big FOV. Curiously, the 2" Pan's did impress/surprise me as despite their size I found them to be relatively light in weight. The 35mm was particularly light despite its coke can dimensions. IMHO the best kept secret in terms of size v performance in the Televue range which I nick-name 'mighty-mouse' are the Nagler-zooms. You can only really begin to appreciate these marvels once you have played with one in a good quality refractor (however brace yourself for $400+ for an EP smaller than a 20mm plossl).
The one general trend I can perceive in the TV EP range is that biggish/bulky EPs are from ROC Taiwan whereas all the small ones and their barlows seem to all come from Japan.
The Terminagler might be an exception to this pattern though as I didn't look at that particular EP