Actually, if you read the link the onl;y things it really says specifically are what effect pines do/don't have on soil acid levels and what effect they do/don't have on nutrient levels. There's not much there at all about soild compaction, friability, texture, inter granular adhesion qualities etc.
And hidden in amongst it all is this litle gem:
However, changes in the nature of surface soil organic matter is still likely with pines because of the high carbon-to-nitrogen ratio found in the needle litter under pine plantations.
Basically they can still leave the soil completely rooted and not contradict the article you've linked at all...