That is a reasonable question to ask. I would say it is possible to attain and it is not possible to attain. There are still some "old" method coaches out there that feel you can not get faster...you are what you are with speed. IMO, and this is after training 10,000 or so athletes, this philosophy is "bull-honky." Speed can be taught. You can change levels of speed if you are thorough in your training as well as planned out. This includes and most importantly, strength, strength, and more strength.
Once you emphasize the strength aspect of your program, addin technique days as well as agility days, speed levels will change. But, make sure it is the right way...do not go out and run 100's full speed everyday, then the next run 40's and ladders at 100%..train smart.
Without getting long winded, meal plan is imperative as well. Eat right and your machine will run right.
As for the "no" answer...a couple of the guys you mentioned are born with something...something that was brought down by a higher power. Yes, we can achieve a level of it with hardwork, but not be the exact same. Vick, Bush, Sayers, Jordan, Carl Lewis...are just some that have that glide...and dont forget the best at making people look silly...Barry Sanders.
Hope this helps,
ps....too bad Barry couldnt play a SuperBowl in his hometown like Jerome