Interesting, but operating systems & graphics applications conform typefaces to different subpixel grids. 17pt Times in Pixelmator on a Mac is not 17pt Times on

Interesting, but operating systems & graphics applications conform typefaces to different subpixel grids. 17pt Times in Pixelmator on a Mac is not 17pt Times on Photoshop on Windows, and certainly not 17pt Times on a scanned document printed on an undisclosed substrate by an unknown printer. Similarly, typeface tracking adds a significant margin of error to this interpretation method. Metrics can vary by application and some applications will automatically provide optical tracking adjustment for a better aesthetic. It's for these reasons that I'm convinced that anything other than trivial (in terms of LOE) & obvious disclosures won't be made using this methodology, and we can't universally trust the results.