iTunes Plus - Worth The Plus?

http://www2.blogger.com/img/gl.link.gifiTunes Plus offers songs at twice the bit rate (256 vs. 128) and sans DRM. The lack of DRM to me provides the value of the 30 extra cents - but does the bit rate?

According to two independent sources, probably not.

The average person can't tell the difference between the two. My ears might be a bit better tuned that the average person, but I don't hear much of a difference either. But storage space being dirt cheap, why not have the higher quality?