Nope. Even using an untrafine fogger nozzle produces water droplets with significant mass/inertia over the air. For the water to become a vapor requires heat energy, a large temperature difference between the water and air.
Of course they will tell you "its fine to use", they want you to buy their product. Note the bolded keyword "should" in their answer, that gives them denial of liability when the water does damage your turbo.
Installing a nozzle correctly post-turbo is not one bit harder than doing it pre-turbo. If their system pressurizes the water enough for the nozzle to "vaporize" it before the turbo then they are using enough pressure to inject after the turbo, which means there is no good reason at all to inject pre-turbo.
Most pre-turbo hack jobs use a low pressure high flow pump, which will NOT have enough pressure to vaporize the water and relies on the compressor "chopping up" the water. Those systems are very cheap, which is usually the given reason for injecting pre-turbo.
The only valid application for pre-turbo water injection is in place of an intercooler between stages of compound turbos.