Interesting bit of retcon...
The whole concept of doing the Kessel Run in 2 parsecs is tongue in cheek.  As he's saying "Hey - I can do the Iron Butt motorcycle ride in 11'000 miles".  Yeah, no kidding, the Kessel Run 
IS 2 parsecs in distance. 
Hollywood scifi writers... 

Of course, leave it to Trekkies to point that out 
