It's been slow (for me) since 3.0 dropped, so perhaps it's something to do with the introduction of wing missions. And it's consistently and noticeably slower than pre-patch, so not likely to be network related. The one time it was quick was when I docked at a station in lockdown, to hand a mission in, but there were no missions to display. Board opened up instantly.
How do you ping it please? When I try from command prompt it times out. I assume they have pinging blocked! Got the address from my currently logged in session.
You cannot ping AWS servers, they don't (seem to) allow it. However, there is a
utility that allows you to measure your latency to them. The server(s) that you are looking at are the ones in Dublin.
That said, with respect to sleutelbos, I don't think it has much of an impact on performance. I had a long support issue regarding poor game performance (very long instance loading times) that we suspected might have been network related (it wasn't), and was told by support, who were told by the devs, that my latency which is always in the high 100's ms was not something that would impact game performance.