Well, he did answer you in good faith probably to best of his knowledge. He might not have access to all the facts or stats, he might not have correct information... but this is a forum, we share ideas, opinions. I think you offended him. And it would not be fair to offend someone whose sole purpose was to share information with you.
As for diskeeper, i believe real time defrag and frequent defrags would do more harm than good to the drive. Unnecessary wear and tear. This depends on your usage scenario though. Big data files (movies, etc) are usually on a different partition. I do a quick format on that partition every once in a while and move hte files back. It does not get defragmented. For OS partition, in about 6 to 9 months of usage, windows registry becomes bloated. I usually do a quick format/reinstall or put the initial image back. Doing a manual defrag once a month or occasionally is more then sufficient. My fragmentation is not above 5-6% at those times. I sometimes copy files elsewhere (by booting into other OS on other partition) and do a quick format / copy back. So in my opinion, it is just not necessary to pay anything for defrag. And moreover, if you are doing regular housekeeping, defragmentation is not something to waste time on. As for placement of files in inner/outer tracks etc (i dont know if diskeeper has that), that is also a waste of time too. Not worth bothering for a miniscule performance increase in my opinion.
Your opinion was very helpful. I understand that I sometimes come off as harsh, and true it probably did offend him. i am sorry for that.