The skin is actually not thick, I would imagine if the skin is any thinner, we would have a lot of bugs eat through the skin.
Sorry, this is not the Wurtz I'm growing, purchased from Excalibur. DEFINITELY NOT THIN-SKINNED. The skin of my avocado is so hard it actually resembles a shell, much harder and more brittle than the skin of a Hass, which, in fact, is quite pliable and easily separates from the flesh. The flesh of my Wurtz adheres to the skin. (Which is why I say it's a negative factor, along with the large seed and THIN FLESH.) Also, the size of my fruit is small to medium. I will try to take pictures of the last fruit, but my tech skills are minimal.