Just bought x100, x100s announced! Should I return it & wait for x100s?

why would you, have you paid 1400 bucks? other stick with it the X100s will need to be first tested to be seen better. The IQ will only be better in high ISO situations but you may trade off some other problems not yet known.

X100 is sound now you know what you gor and if we lucky they may manage to crumble in an Q-menu

So if you paid $1200 and think it was to much than bring it back and wait another 1yr by than the next model will be in the line up 

I see the X100 now used for 600 to 700 bucks that would be a steal worth. Think about that if you can get your money back. Other go for the X E-1