It was fun to watch - I don't care if it was real or not - I give benefit of doubt where it is due, and I sure as heck can't imitate that well - so I will give full benefit.
Besides - who (only) amplifies anymore when practicing? Wouldn't everything also be run to a multi-track mixer into a PC so you can hear how it sounded and analyze mistakes, etc.? I would think someone serious would be doing that and even video taping myself to see where my hiccups were coming from.
Good stuff!