The purpose of the Quarterly Review is to provide raw statistical data (or price trend information) for those who are interested in these things i.e. statistical and economic anoraks like myself or others, who may find it useful for whatever purpose. There is no commentary, analysis or opinion provided with the data, so it does not attempt to discuss service quality or any other issue. As prices are to some extent a reflection of demand and supply in the marketplace, it might just be a crude indicator of things that are happening in the real world.
I'm not the only person who likes to produce statistics. The CSO do it also.......it's just that mine tend to be more up to date......plus I have the benefit of being able to gather 100% of the relevant data in a matter of an hour or so.........a statisticians wet dream.