It does all boil down to the individual dealer/group.
Same with service work.
Local Nissan garage to me does not have the best reputation (part of large group with various franchises and far too big with a high staff turnover) although to be fair I managed to get a good rappore with one of their better technicans during 2005-2009 who I could see had a real interest with my 2 previous 350's (both in warranty) and I always made sure he would be doing the work when the ZEDs were booked as he guarded them as if though they were his own. And he was suitably thanked as I never found any problems post servicing But when it came to getting the 370 the Service Manager stepped in and said they couln't service 370s....and I had to look elsewhere
So off to Motorline Tunbridge Wells (HPC dealer) and all I can say is the service and customer care has been very good and professional - its not cheap (compared to the independents) but they seem to go out of their way to make the relationship work and its always nice to have a 370 loan car to use whilst mine is with them. Have twice been given the keys of later 370's to take away and experience was a nice bonus - undoubtedly to hopefully make a sale at some point, and if I do I would not hesitate to go there if another Nissan is on the Ebized list of new cars, rather than the local dealer - so their long term loss.