I realise the two are very different tyres, it was just a surprise to go from M+ tyres that had 5000 miles on them and looked like they were good for at least another 5000, to D+ tyres that are showing blue protective strip after less than 2000. I guess I've got maybe 17-1800 miles on them. If I got 10000 miles out of M+ and 5000 out of D+ I wouldn't be surprised, it's just the scale of the difference that surprised me, if M+ tyres literally last 5 times as long (if not longer) than D+.