Speaking from my personal experience.
Both my local SEAT dealers, Robinsons Lowestoft and Castlegate Norwich, have been good to me and both have smart showrooms and friendly staff.
Robinsons VW Lowestoft have a nice showroom and have been friendly but not pushy when I have been browsing while waiting for my
Ibiza to be serviced.
Robinsons Audi Lowestoft have now lost their new car franchise but have been fine, like the VW section.
Both the local Skoda dealers were hopelessly disinterested at the time when I changed to my
Ibiza and are now Daihatsu dealers. Simpsons Skoda in Yarmouth used to be VW dealers and supplied and serviced my last three Golfs but have completely ignored me on the couple of occasions I have been in to look at the Fabia and Octavia VRS and seem to radiate an air of smugness.
So in my experience of the VW group marques Skoda have been the worst, but I guess it just depends on the particular dealers in your area.