Different algorithms and service locations were differently affected. For some (Sha256 and Scrypt on NiceHash) were almost unaffected, because these most likely had big fat orders with enough of BTC loaded.
Quark on NiceHash for example, was severly affected - I remember the price was 10 times lower than usual when we started web back up, but then in few minutes price went up as buyers started placing new orders.
To follow up on this, I was mining SHA256 and saw no drop in pay. The order books weren't accessible, so this makes sense.