Being on mobile has dropped my chances of getting a valuable pet by at least 90%.
My first page had a store dragon, which by the time it took for me to swipe down to see it was too late. I tried at least two other wishlist pets, before finally having to settle for a slightly uncommon.
But it appears the update has not done anything to stop the snipers from catching the high value pets. My guess is those who do get these pets on a regular basis have methods that assist them. The other explanation is that common to very uncommon pets are under reported. People who get the vc's are less excited, less motivated to post about their catch, especially if it is a recent one and the user has several of that one and not interested in collecting them. Those who do post about their finds, might be setting timers and doing their best to be present every time the pound opens, then only post when they get something of value.
It also doesn't help much that posts of missing the pound, seeing nothing but commons, or no wishlist pets, leaving empty handed are discouraged and often weeded out.
The best I can do is be on a desktop and zoom so I don't have to scroll down to see all the pets and hover my mouse cursor over the top left space where the button would load. Being on mobile, I can't do this, thus I've had to settle with mostly low value pets.