NCM chart, page-27

As we know relative prices change day to day and if you're in Evolution or NST, no-one will be missing out.
This simple 12 months comparison of these two and Regis with NCM make your point, but not by much, overall. Certainly the last couple of months have seen NCM more out of favour and this may be when the above considerations were identified???
They may lag to an extent, but I can't imagine them being left too far behind...