You’re way off. I’m tethering VZW 4G LTE right now and I’m pegging @ 1.9MB/s on a real download.
You’re thinking of megabits or mbps. I can hit ~40mbps on my TWC on some occasions. 3g I have hit a best of 4mbps and 4g I’ve had 30mbps, but generally it tests around 18-25mbps for me.