I agree. I think baptisms should be in cold or ambient water. It is more than likely biblical and makes for a much more memorable baptismal experience.
Of course, running cold water is even better. But, CAUTION must be observed in such a situation. I will never forget the river baptism in which I made the rookie mistake ( I was a college student) of baptising a young lady who was wearing a dress with her head downstream. Had I not kept her underwater and run downstream with her for a bit it would have been a very revealing experience for all.