I think mtgox is changing the output of the api... looks to be dynamic, probably based on traffic to reduce lag. I will see bitcoinity not report a sale for up to 5 min, then a flood of action and another delay.
Thanks dandirk,
I see pretty much the exact same behavior. Since bitcoinity is AWESOME, i will assume the fault is on the Gox end. Does make it pretty much impossible to do quick trades, though.