I think you may have been reading the webpage incorrectly. Beat Angel is a small, independent production based upon a script written by Vincent Balestri, who for about 20 years traveled around performing his one-man play, "Kerouac: The Essence of Jack." Balestri's performances of Kerouac were probably the closest thing you'll ever see to Jack in real life. I believe the quote you cite was from a review of that play--"a Kerouac so real, it's eerie."
I certainly approached the play with a good deal of trepidation and skepticism, but over the next two years, I saw the play four times--including being in attendance for its final performance.
I cannot speak to the quality of the movie Balestri and friends have now created, but I can assure people they are not likely to be offended by Balestri's interpretation of Jack's spirit. He is very much in touch with that.
I reviewed Balestri's Kerouac for the "Kerouac Connection" in 1998. If you're interested, you can read that review online at http://www.angelfire.com/ca2/kerouacconnection/contact.html#DDR
However good or bad the movie might ultimately be, it's not one of those money-grabs out of Hollywood, but a labor of love, and you may rest assured that Vince and everyone involved in the project did it out of love for Kerouac.
diane de rooij