Thise 3 speed tests all agree pretty well that you're getting 1.6 M
bps d/stream and 0.4Mbps upstream. Which also tallies with what your router is telling you, there's alwways some loss from the actual sync speed shown by the router compared to your actual throughput, normally the throughput is around 79-85% of your sync speed.
200K
B/s is about right for 1600k
bps speed as one is measuring in Bits and the other in Bytes. There are 8 bits in a Byte. The uppercase B denotes a Byte, lower case a bit.
As to whether it's the maximum your line can give you depends on your line stats, from your Netgear router you can find the Attenuation and Noise margin under Router Status and Show Statistics.
If you enter those into
this site along with your sync speed it'll give you a pretty good estimation of what your line's capable of.
Give it a go and post back your results