Red,
My shock linkage does not have any bearings that are tapered or adjustable. Mine has cylindrical caged needle bearings that are trapped under a fixed shouldered bolt. In many applications, solid bushings are much better, although it might seem at first glance that the fancier roller elements are inherently better.
Maybe you are talking about the swingarm pivots? Those are Timken-type tapered rollers. Much better there, as the swingarm is load-bearing, both rotational and axial. The shock linkage not so much.
Solid bushings: more contact area, thus lower surface pressure on the bolts. Check out the brinelling on YOUR bolts when you get them apart. Local microwelding on the bolt shank due to high pressure caused by small needle bearing rollers. Here is a link!
http://en.wikipedia.org/wiki/BrinellingMore contact area eliminates this problem, and is also the cause of the more solid feel, as the solid bushing resists angular loads better.