So, I&W wasn't quite as far ahead as I was expecting:
1. Images and Words: 8.429
2. Six Degrees of Inner Turbulence: 8.241
3. Black Clouds & Silver Linings: 7.909
4. Awake: 7.868
5. Scenes From a Memory: 7.589
6. Train of Thought: 7.582
7. Octavarium: 7.344
8. Falling Into Infinity: 6.896
9. Systematic Chaos: 6.783
10. When Dream and Day Unite: 6.341
Like you say Blob, this isn't the same as "DTF's album rankings", because it is purely based on song ratings. I might do that sometime as well (getting everyone to rate each album out of 10), to see how it compares.
I didn't include ACOS (obviously) or the unreleased songs, although interestingly the unreleased stuff actually had a slightly higher average than WDADU!