Charlton Heston Secretarial Signature Study

I'd like to call your attention to a signature study recently posted on a blog via Autograph Magazine Live. Steve Zarelli believes he has identified the identification factor in Charlton Heston secretarial signatures, if he is correct this is bad news for both through the mail and purchased Heston's. It looks like most Heston signed items are secretarial including my own. It appears even expert authentication services such as PSA/DNA got it wrong
  
Here is his synopsis:
The Theory
Photographs and other memorabilia sent to Mr. Heston's office were signed by a secretary. However, Mr. Heston did authentically sign books through-the-mail.  
Real vs. Secretary
In authentic signatures, the R in "Charlton" is distinctly a lowercase "r" and less than half the height of the L. The first four letters are clearly "Char."
In secretarial signatures, the R looks much more like a lowercase "l" and is about the same height as the L. So, the first four letters appear to be "Chall."

Steve would love to hear your feedback and thoughts on this. He fully anticipate some resistance to the theory, because denial is always the first step. In fact, he would love to be proved wrong, because that would mean he wasn't sitting on a bunch of secretary signed photos!
Steve Zarelli has been collecting since the early 90s and is the UACC Ethics Director.

His blog is via www.MrZipper.com