""are lighter than butyl, are incrementally faster than butyl""
thats wrong, says guru Jan Heine

))) inner tubes or tubeless have no influence on tire performance. ...... don't ask me where he said it

))
Well, latex is faster for me. And that’s the ultimate test, whether or not it works for you. Even as I get older (I am now on the downslope of 60s and quickly approaching 70). I find that when I use latex I am faster than when I use butyl.