I'm no statistics god by any standard lol.
I have tried Talon jungle a few times myself though. (Not recently so take this with a grain of salt)
You have to think of it like Jungle Quinn.
It's not about their sustain, or their clear or their objective control, it's the unique mobility they brings to the team.
Talon's Q does heal off of Jungle Creeps btw.
It's definitely viable, and I'm sure you can find some players online who do it. I'm just not sure which match-ups are good vs bad etc.
Or how overall effective it would work as a damage JG.
The surface issues it brings up is Jungling as Talon encourages maxing Q first, and when playing the new Talon you want to avoid that.
The heal scales with level, not ability rank, so maxing it first won't bring you max benefits that early in the game.
The other issue is that Talon has pretty 'meh' movement speed due to his E mobility, which can make first clears and early ganks a little painful without boots.