TCase is Tcase.. Get it? Warranty is void overclocking per Intel and they had same disclaimer and info you posted with Bloomfield. Many degraded their chip when Bloomfield was released and the community learned mid to upper 70's was the "safe" limit. As you know many overclockers, so do I and I have seen people degrade their chips at this temp.
That said, unless he is running HWBOT competition, 4.4GHz will not have any noticeable performance difference and guaranteed a longer life. I like to give sound advise and will personally guarantee a long life at 75 and under. I will not over.