I've just leased GSD0 and GSD2, mining at wafflepool.

Both rigs has over 10% rejects at the european server, us-east is much better. Where are the rigs located?

Edit:
Switched back to the european server and now it's better, maybe you had trouble with your internet connection? Wafflepool servers has been very reliable (I'm mining there with some gridseeds). Hashrate at leaserig.net for GSD2 is much too high at 11 MH, but pool rate is correct.