No problem! Let's see if I can answer it all

1) QC and Adaptive Fast Charging are basically the same thing: Fast Charging. They're just different names given by different companies. QC, the most generic of the two, has several revisions and QC2 (currently what Samsung's AFC is based upon) is slower than QC3.
2) USB-C will let you use Fast Charging.
3) Wireless charging is slower than a normal, wired charger, so people tend to assume that because a wireless charger has 'fast charging' slapped on it, they'll have the same charging speeds as a wired QC or AFC charger. They won't. A Wireless Fast Charger is closer in charging speeds as a normal, non-QuickCharging 2A wired charger. So a 'Fast' wireless charger will just charge your phone like a normal charger would, just faster than a normal wireless charger would. 'True' Fast Charging can only come (right now) from wired chargers equipped to do so. The charger included with the Note 7 will be Fast-Charging-enabled.