Bad test. As I said, it depends on the game. If a game doesnt load much, since its has so small maps that fit into the whole RAM and VRAM, there wont be much loading. Check Arma 2 & 3 benchmarks, World of Tanks, pretty much every MMO, open world RPG. They all benefit massively from it.
http://forum.worldoftanks.eu/index.php?/topic/396220-world-of-tanks-disk-usage-test-sollution-for-fps-drops-andor-freezes/
https://www.youtube.com/watch?v=2eeRse5mtGA
https://www.youtube.com/watch?v=dleZswcWN00
https://www.youtube.com/watch?v=47dt-y27eYk
https://www.youtube.com/watch?v=qUGPVFcElkI
https://www.youtube.com/watch?v=wqLQkqBzsZ4
http://www.reddit.com/r/skyrimmods/comments/2hfjxn/would_installing_skyrim_on_my_ssd_or_regular_hd/
And again, test it yourself! Its easy. Most games you can simply copy over to your HDD/SSD without having to reinstall them. You WILL notice it instantly. I dont play games without SSD anymore not because of loading times, but exactly because of this.