It could be the router and the test I use is at a free hotspot. You will encounter folk that will point out other devices are fine but we still check out the router and more.
Keep in mind a new laptop will have to download how many gigabytes of updates and you never do your speed tests on a new laptop. Give it a few weeks.
I bought the Asus N65U about 9 days ago. I had a terrible time trying to install it and using the automatic install it kept failing. I followed the directions and it kept telling me that 2 or more wired connections were detected. I only had the cable modem plugged in to the wan port and then the laptop directly to the router as the picture specified. I skipped it and did the QIS from the web interface and I got the router to work and everything is connected now. We are having a lot of issues with the connection dropping and on my desktop upstairs it is really slow (2mbs) and we currently have Time Warner 15 Mbs. My wife's laptop gets 20Mbs from speedtest .net but when watching videos and normal surfing it is slow. This is the same on my PC. Is there a setting or a way I can configure this to get this to work? I paid a decent amount of money and based off of good reviews I bought it but it is very unreliable.
I also tried to connect my work computer to it and it was good until I had to connect through a VPN to get to my work and from that point on I had to shut down the connection as it wouldn't stay online.