Changes to Orchestra tuning.

The Historically Informed movement frequently emphasizes tuning.  I wonder if the tunings they choose contribute to the occasional scratchy sounds the string players produce 

My guess is that it is specific to that hall, based on someone having ’new’ measurements made, as I say, just a guess, but I can imagine the process of getting an institution to change a fundamental, there must be a convincing argument for the change, not so convincing for the status quo

There is a chart showing the history of musical pitch here

music theory online : pitch, temperament & timbre

and there is this

history of piano tuning

Is this classical music's version of the "loudness wars?"

@bolong 

no, this is a real issue, that effects music at it (re)creation.This Loudness Wars is a mixing issue 

I was being facetious. However, increasing the string sections "brilliance" with the higher tuning might be considered an increase in "loudness."