Yes, tagging along behind the customer as they walk around the
shop doesn't equate good service - I do appreciate a quiet
environment where i can look around for my stuff, as long as the
staff is pleasant & courteous when i do approach them for
help.
You dun know me in person, so dun go shoot off ur mouth like
this... what makes u think i swagger into the shop expecting some
SIA service level? 
Anyway the level of "priced shop" (in ur words) shouldn't be the
only factor in determing how good customer service should be. Are u
saying consumers deserved to be humiliated or subjected to poor
treatment because they are only shopping at an "average priced
shop", and only at top-end boutiques do they deserve good
service...