Thanks Chris, always tighten mine to 100/110 ft lb torque, chatted with Bob this morning and we think the set he got may have been a 'knock of'. I'm fairly certain mine were genuine, had on them on for Wales and no issues, been out for a pre France road test and off out now to check the nuts now it's cooled down. Watch this space.
**edit** Checked them all and they were all fine, took them all off one at a time and checked the threads, no disfiguration or signs of "shavings".