Originally Posted by Texas Turtle
I sometimes use chicken sitters to save space on the WSM. I can get more birds in it vertically than by spatchcocking (although I like spatching better). I have both single and double sitters (gifts) and I can get 4 - 6 on the big WSM or the big offset.
I totally agree with this reason for doing beer can chicken (or, as I mentioned, because it impresses some guests). But other than cooking space & for "wow" factor, spatchcocking a chicken is the way to go.