Running the same combo most of the time I get similar life out of them but I do retire* them way before the calicot layer shows.
That said, I don't race them either which should prolong life expectancy by at least 30% if not more.
An important factor IME is where you ride as well. I avoid urban areas like the plague as I find Veloflex to be surprisingly puncture resistant all things considered, they're just not city tyres. Were never meant to be either, so...
* Either I put them aside as emergency replacements should I run out of stock or put them on the winter wheels, either way I don't bin them unless their totally shot. I may have binned 3 to 4 Veloflex tyres over the past 10 years that were beyond repair or were badly repaired (by me) and ended up not being round enough to be put back into service but that's about it.
Whenever I get back home I check the tyres for flints, cuts, whatever and they're wiped clean using a small kitchen spunge soaked in water and some mild dishwasher liquid or, occasionally, a wipe down using a mixture of 1/3 household vinegar and water. The vinegar/water mix degreases the tyres nicely improving grip for a while. It's also being said that it sort of "nourishes" natural rubber similar to waxing leather etc. No idea whether this is actually true but it does not seem to do any harm either and vinegar is cheap anyhow.
After another check up I deflate the tyres to about 1/4 of the usual pressure and that's that.
Minor repairs are done using Tufo's old liquid latex (15ml often suffices) formula which is replaced by Tufo Extreme if I'm not mistaken. This yields an almost 100% success rate with a negligible amount of unwanted secondary effects.
Major punctures or multiple punctures receive surgery. I.e. the inner tube is replaced as I often find this to be faster and requiring much less sewing work on my part than spending time localizing puncture(s) followed by local surgery...
You do need to know how the put a cut in two latex inner tube back together though which can be a bit tricky at first until you get the hang of it.
P.S. Naturally, every single tubular I own, regardless of pedigree, does receive a goodnight kiss on the forehead every night before I hit the sack....
Being a snob is an expensive hobby.