It really depends upon when the title was released. Rhino has alot of product out there. You'll see titles that were released ten or more years ago. You'll also see stuff which is only a year or two old. Check the copyright date on the disc case. Of course, the more recent stuff sounds better than the older stuff.
By the way, the Randy Newman reissues sound way, way better than the original Warner Bros. cd's. The new "Sail Away" sounds great.