Whoops... got distracted by weekend-y stuff.
Click for full size where you can clearly see a laptop connected to a LAN port of a TL-WR2543ND and downloading at 233mbps through the WAN port. Some scrolling may be required.
Being 4am, I pretty much just yanked it off the shelf and plugged it in. With (literally) off the shelf settings and upgraded software. I couldn't really bothered tweaking the settings to get the most performance so you could probably get more.
Being a TP-Link it's only got a lowly 400Mhz CPU whereas competitors have had 680Mhz-1.2Ghz CPUs in their routers for years. Yet it's doing well over double what you claim to be the maximum. Unoptimized.