Well - no. Imagine if they were a complete triangle in cross-section....
I think it's the curve at the back bottom that really fucks them up, though. I have two (the #2 and #4) and i find normal RPs sit way better in squamish cracks and pin scars than either of these. But there are two places I've found where the Peenuts seem to fit better. One on Leviticus just below the dihedral, and one on Rock On at the start of the crux pitch.