I apologize if something like this has been posted before, but I was listening to demos from various sample libraries, and I noticed something rather interesting. Maybe it's because I'm a string player, but without exception I found the percussion, brass, and woodwinds of each library to be much more convincing and realistic than the solo or ensemble strings. They just seem to have a more synthesized sound to them. It is especially noticeable in transitions between notes. Glissandi/portamenti seem much more realistic to me when listening to sampled winds than strings, and sampled brass seem to have a much more convincing attack than accented strings.
On a similar note, I've noticed that more samples doesn't equal more realism. I've been very impressed with the Gofriller, especially in relation to other, more expensive solo cello samples on the market. With the other libraries, it seemed as if the programmers were trying so hard to recreate each kind of attack and stroke that they neglected to retain any continuity between samples.
Is it my string-biased ear, or are string instruments inherently more difficult to digitize while retaining the integrity of the instrument? Is it because samples are more "pianistic" in nature?