Practice tool proving ADCs are the new assassins
Full build Caitlyn (I specifically picked her because she has no special attack speed scaling which would bump the numbers up even more. She's your basic vanilla adc). 1200 DPS to practice dummy. 1450 DPS with rageblade instead of another zeal item. That's 2400-2900 damage in two seconds.
in contrast, Jinx obliterates targets with 1850 DPS with rageblade and her passive stacked up. 3700 damage in two seconds.
Talon: 2200 damage with W/Q/AA combo. But it takes at least 2 seconds, maybe a bit more, to execute as you have to wait for the W return before you jump in. 2700 if electrocute is up. You can bump that up maybe around 3500-3700 if you get both hits of your W and R in, but this also still takes over 2 seconds. If you use both your W and R followed up by your Q and auto attack, you might have 3000 damage and only have to wait one second.
EDIT: I forgot that the bleed effect takes 2 seconds after the combo is executed to even fully apply the damage. That significantly lowers Talon's 1 and 2 seconds burst damage potential, spreading it out over 3-4 seconds.
So the ADC outputs equivalent burst damage most of the time, but also does it as sustained damage. And the ADC does that with only one lethality item, whereas Talon had the full lethality build plus black cleaver.
Keep in mind during all this that the ADC is likely lifestealing the entire time. Your initial hits in the first second will be wiped out by their lifestealing in their first second of attacks, which can make it impossible to execute a full burst combo against them unless they are slow in responding.
If they have even a minor amount of peel from their team then it's all over.
though?