Recently purchased an 05LGT with 88K from another board member. Good oil change records and no issues but this thread had scared me a little. Had some other work needed at dealer, so had them pull and replace this bolt. For $99 including the parts it was easier than the hassle of doing myself. Bottom line, there was some minor debris but nothing that would have caused any issues.
Called 2 dealers before I had this done, both claimed to have never had anyone request this be done and had never heard of this bolt and filter causing turbo failure. In fact, despite showing the dealer that performed the change the replacement a copy of 02-103-07, they still marked the paperwork that I had been warned of the risks of replacing the bolt.....
Bottom line, gained some peace of mind but will never worry about this bolt again. Will just ensure I do full synthetic changes every 3750.