Is remastered mainly just less jitter?

"...the really early masters for CD are poor.."

Unless I’m not reading the numbers right, but looking at the DR values this theory doesn’t seem to hold up. There are lots of early 80’s CDs that are much better than then their later counterparts. I expected the opposite. Interestingly enough, many of the "popular" music like Beyonce, etc., have real low DR values. This supports the theory around the quality of (compressed) sound geared towards the ear-bud/mobile user community.

It looks like the older the recording the higher the dynamic range. Just scrolling through the chart, regardless of the artist, the lossless CDs from late 80's and 90's all have consistently higher DR. This is completely the opposite of the common wisdom. Anyone else noticed this or am I just misreading the numbers?