One thing is for sure, included or excluded, I can still break apart codominant stems with my hands if they are 2" - 4" in diameter or less.
I think that if the not too much bark has become trapped or included, the extra 14% may be a reasonable assist, but not the most desireable.
The trapped bark as trees get older really seems to "do them in".
It's nice to see that someone took the time to analyze this.
If they post, here's a few...check out all the trapped included bark in the flowering plum tree cross-cut... |