I dont get it. A key is a key. an A Major Scale has all the same intervals as any other Major scale. Its just that its played at a different position. Minor scales (which are modes) are a different story. They do sound more melancholy. Maybe this list has more to do with the pitch of the root note as opposed to the actual scales.
If you want to start experimenting with different *feelings* with scales\notes\ etc then look at the Major scale modes and the Chords that go with them. Dorian, Locrian, Aeolian etc...