Agreed, with this and with the OP's sentiment.

I've had my fair share of annoyances with CX, but I still think the DM program goes above and beyond at a service level and I'm glad to re-qualify each year. Service @ CX indeed has inconsistency issues, so for DMs who may only do 20 or so sectors a year long-haul there might simply be a poor sample size. You get one bad crew LAX-HKG and that ruins 5% of your CX experience for the year, and sticks with you for a while. I know when I run into a bad crew or prickly ground staff it sours my opinion of CX.

There's no excuse for the massive variances in service levels, but I think once you start cracking the 50 or 75 sectors a year level, and really mixing up your flight patterns, you start to have more and more experiences like the one the OP had. More often than not, ground and air crews are very respectful of DM and try to go out of their way to accommodate them.

Based on a few anecdotes l do think CX has an internal way for ranking revenue pax (including DMs), and I always wondered if they use that to give some DMs better ground service levels like the one the OP described (for example, maybe paisan86 comes up as some who spends xx amount on average and therefore gets flagged for such a call).