Impulse used to be capped to download at around 250k/s, but now it seems to be able to range from 500k/s to 1,000k/s or roughly 1/4-1/2 of my maximum download speed (yes, I have a very fast connection). That's a far cry better than it was, but still not as unthrotled as Steam or the Internet in general. At least not for me.
