Yup CM that was my understood take on that offensive too,however after reading the account of someone who was there it rather surprised me to find that they felt the weather had indeed been a major factor-if however the Germans had secured major fuel dumps and weather allowing re:poor airpower visibility,been able to distribute the fuel it may have caused major delaying problems and although not actualy changing the course of the war it would have allowed the Soviets more time to push even further West than they did,possibly changing the face of the Europe we now know.