I just gave him his food with some water in it and it really seemed to help!! Added bonus, he loved it!! He scarfed it down and it didn't hurt him!!
I think it depends on the puppy. I never soaked the food for my male but my female didn't really like to chew her food while she was teething. For her I soaked it so it got a little mushy. After the teething she went back to non-soaked food without any problems.
And if your pup likes it, why not?