No, the "standard" 6 pos chip has not been around since 2003 when the 6.0 came out. The 6.4 uses an even larger (think 5+ mb) file to download which takes a long time. The 6.7 has even more to overcome since it uses UREA in addition to the DPF.
To be short about this... KEM has hacked off the exhaust of a new 2011 and got around the programming. I know Eric has only changed the programming and even though this isn't a "power increment"... he can spin the tires from a 60 mph roll.... To put it in perspective, it took me over 600 RWHP to do that in a crew cab. His is a regular cab.