In my limited experience, I haven't yet touched anything down. I'm not going super fast just yet.
ON the other hand, focusing on what you can touch down, how far you are leaning, how much of a "newbie stripe" your tires show, whether you have your knee on the pavement, and so forth, is mostly a waste of time. Focus on improving your sense of security, control, and balance: you can go very very fast indeed even on bikes that have a lot of stuff that touches down long before you touch anything to the pavement if the rest of your technique is good and you're not upsetting the chassis. Speed comes through smooth, direct, positive control—knowing when to be on the brakes, when to be on the power, and how to transition between them—while avoiding getting the suspension into a bother. You hang your knee out AFTER you're reaching the limits of what the bike can do so you can gauge how close to those limits you are.
Look at some of the classic riders and road races of the 1960s. Those guys were hellish fast while riding bikes that could grind almost any bit to garbags. Yet they tended to stay poised on their machines, tucked in to minimize wind resistance (due to so little power to work with), and didn't grind much of anything even when they were running speeds that make any of today's normal riders' hair stand up from terror.
