And this was verified via NMR, that a typical wacker is 85%
Phenylpropanone, %15 phenylpropylaldehyde.
No propiophenone is formed although isosafrole is a by-product.
You can add inhibitors (free radical i think not sure though) like hydroquinone to prevent aldehyde formation, even read that this increases yeilds in alcoholic wackers and reduces temperature sensitivity, it's a patent, have it somewhere.
You know how patents are with thier inflated sometimes bogus claims though.