Are you looking at the same market? The default market on OhMyCoin is Gemini which has fewer updates than GDAX.
GDAX does the fade-in and fade-out animation on the order book, which helps give it dynamism. It may have a bit more render frequency, as OhMyCoin orderbook is rendered every 200ms. I considered that fast enough, given it's nature nobody is going to read and process the data faster than that, and it consumes much less CPU than GDAX dashboard.