What do you believe PDR proves? I have no problem with people creating sensor metrics, but you must interpret them in light of what they are actually capable of saying. PDR is not a measure of noise performance, relative to exposure. It is a measurement of how far below the highest number in the bit depth of the raw Bill's standard of minimal image-level SNR lies. It has no direct indication of noise vs exposure. DR and PDR at higher ISOs than base are fluff, with no substance. You can modulate the PDR or DR with the same sensor at high ISOs just by changing the amount of headroom in the raw, using the exact same sensor, just like Canon does with HTP vs non-HTP. If Bill graphed Canon's HTP measurements, instead of the non-HTP ones, Canon would come out as king of PDR or DR at ISOs above base, even though HTP is slightly noisier (2x the post-gain read noise) than non-HTP.