* Your RWIN reads as 16384 
* All tests passed perfectly.
* We  recommend you leave everything as it is!
Detail..

Max Segment Size is  1460
Your MTU is set ok
SACK Permitted (RFC2018)
Ping stability 65 64  66 68 67 65 64 67 66 65
Quick packet-loss tested ok
DefaultRcvWindow  (RWIN) is 16384
Your RWIN limits you @65.7ms to 1995kbps
Your RWIN limits  you @200ms to 655kbps
Your Path MTU Discovery is ON
Max sized data packet  from you 1500
* End