ok, i can't believe i haven't seen this topic before. The next-gen expert is here...
I really disagree, i tried the demo myself and sonic is not more sluggish.
I will admit the fact though, there is glitches and some downsides.
Since someone before me told everthing about the demo, lemme say the goods things from the bad..
Lets start with the bad.....
1. Sonic starts off a little slower then the other titles, this could be because of the new ring system. You now must collect rings to attain a higher speed.
2. The camera is not perfect, but its better then the Adventure series.
At least there is no suprise unfair attacks or hits..
3. Yes, there is some glitches but there not that bad unless you do something stupid to attain them.
4. The demo was a short teaser-like expierience.
5. Silver or Shadow wasn't availible.
6. his attack is very exagerated (hope i spelled that right,)
when he uses his attack, he slides as if he is on ice. not very good and pretty unrealistic.
Now Good,
1. Very addictive gameplay. Even though it was short, i couldnt stop playing it.
2. You can now use homing attacks without jumping and use them in midair.
3. Graphics has increased INCREDIBLY!
4. The Debris from objects and physics of the game is really realistic.
5. There is weak and harder enemies like in shadow the hedgehog.
6. you can actually hear sonic steps in a realistic manner.
7. camerea is better.
8. Rings have a purpose besides an extra life! When you collect more rings, you speed increases. In the final game, rings can be used as money to purchase things in the town stages.
9. some new gameplay elements, nothing major.
10. a trailer was included in the demo after the stage is finished.
11. The game now uses a "fake letterbox or widescreen" like Resident evil 4. This makes the game seem more cinematic.
12. Rank S has been included and is now the highest rank in the game, this mustve been picked up by sonic rush.
13. Sonic moves more realisticly and is easier to control and he doesnt slide. Except for his attack.
The truth is, this will be even better when the game comes out. I never had so much fun playin a sonic game since CD, SA2, or Rush. I even covinced people who arent sonic fans at all, to play this demo and they loved it.
There is more upsides to this game such as Shadow the hedgehog game elements returning, the return of Blaze, classic levels return and etc., but
what ive told you was from the demo.