probably not. if naruto is any indication, sage mode is powerful but not excessively so. it makes you a taijutsu monster, but there are limits to what taijutsu can do for you. Think of lee or guy, without 8-gates access, or with access to only 1 or 2 gates. I rather doubt kabuto was referring to improved personal taijutsu as a technique on par with Impure World Resurrection. Its probably something along the lines of rasenshuriken.