They are saying the 5 screen is better because its brighter and sharper than the 7. I've compared a 5 and a 7 side by side playing the same movie at the same time. The movie was a downloaded comedy clip off the internet so the quality was so-so. The 7 looked way smoother, the blacks looked smoother and the colors way better. The 5 had blocky pixelation everywhere and the colors look washed out... reds looked almost pinkish. The 7 had no pixelation and colors looked perfect. The 7 is better! Don't let people brain wash you into thinking that the 5 is better.
Link: http://tech.yahoo.com/blogs/hughes/16483
Link: http://tech.yahoo.com/blogs/hughes/16483