It wasn't just the Fed announcement yesterday that produced slow data. I put IQFeed side by side with esignal on the same computer and the same internet connection today, and I also had esignal on a seperate platform using a T1 line and guess what? IQFeed lagged miserably, up to a full minute plus while the esignal only fell behind the T1 data feed by at most three seconds. I cancelled my IQFeed subscription today.
The day I canceled my subscription (next day after FOMC) was not particularly volatile and it still at one point was up to three minutes behind eSignal. I'd say they have a problem somewhere.
I must give credit to IQFeed today. Lots of action after CC was released this morning, and IQFeed kept right up with IB (I'm watching ES). As a matter of fact, IQFeed has been very very good lately. Lets hope it stays this way....