Avoman, ok, I did a taste test for you. You got me curious so I bought the box of Aravaipa fruits from Marta. I figured if it didn't taste good, I could always use the seeds to grow some rootstock.
The box I ordered a week ago had 11 fruits, similar to the picture I posted above. The fruits are not that large, maybe the size of Jan Boyce, I weighed them and can post info later. I cut one open and tasted it when it was not fully ripe/soft yet and it was watery and not that good. The other 10 fruits I waited until they got slightly soft to the touch, and they were much better. It is not bad, no off taste, not watery, but just a mild taste. No fibers so it is not a bad avocado to eat. What I noticed was that once the fruit get slightly soft, you need to eat them right away since they do not have much shelf life on my counter, they all ripened at once, if you wait, they will start to go bad. I will post some photos I took later tonight.
To sum it up, the fruit taste is ok, not much flavor, no off taste, but it will go bad as soon as it is ready to eat (within a day) and needs to be used asap.