I tried the 1/4, 1/2, 3/4/full method with my Savinelli, the real maple syrup method with my Ser Jacopo, and the fill up and fire up method with both my Boswells.
The Savinelli had a coated chamber, new.
The Ser Jacopo had a bare wood chamber, new.
Both Boswells had the Boswell coated chamber, new.
The Savinelli and both Boswells caked beautifully all the way to the buttom of the bowl, while the Ser Jacopo has only caked 3/4's of the way down its chamber.
Now, I'm not trying to insinuate that the real maple syrup method is inferior to the other two methods becuase it is not. I am just stating the outcome of each method with my particular pipes.
All in all, I personally don't favor one method over the other because I am very pleased with the way each pipe turned out. And I'm positive I will be trying each method again with the growth of my collection.