Mike, Just because I have never heard that does not mean it is not true. It does make sense since you are stretching both dimensions that the change in area would be the square of the change. Barring further evidence, I stand corrected.
It appears I did basically the same thing Dan did to make it more 46ish. My scores with it were all over 500 in profile with no appearance points so you can tell it will not be a "looser" with those mods. I am not sure I would stretch the nose moment. With the added weight of the battery and electronics I came out nose heavy on mine with the kit nose. It was designed for a Fox 35 which was pretty light. The LA46, not so much plus the extra fuel. As typical on some electrics it flew well nose heavy. Just for reference it was 1 1/4" from the LE.
My mods, and Dan's, listed earlier probably added only about 40sq" or so, yours are adding over 100 so that may change things a bit as to the nose. You can always shorten it. Making it longer is not as much fun. What are you doing to the profile shape? Stock Twister?
Ken