Unova didn't go by quickly. It's just about perfect, IMHO. It just seems like it went by fast because the other generations were so drawn out.
Would rank Gen V among the best(Gen 4 is probably the worst without counting remakes. Diamond and pearl are my least favorite) --- Pokemon generation six! All abroad the hype train! http://i227.photobucket.com/albums/dd101/Mauduin2/HypeTrain.png