If you look at user reviews of routers... this is where thing gets interesting. You'll quickly notice that all routers sucks, and all are amazing in some fashion (ok, excluding the really crap cheapo ones).
The reason is that they are MANY factors that plays with Wi-Fi.
-> Interference from other surrounding devices, including microwaves, cell phone tower (despite not using the same frequencies, just because they are so powerful) and other routers (neighbors, including, if you are in a building, upper floors and floors bellows you).
And another factor:
-> Compatibility. While they are standards, they are efforts being made by manufactures to supports the most number of wireless cards, you can have compatibility issues.
I can give you a lot of stories about this.
But here is one. My previous system, a high-end business class laptop, Dell Latitude, had the Intel Wireless 5100N. Great card. Intel none the less, they usually make good wireless card, works well anywhere I go, but... not at university. In fact it stop working properly since my university switch to wireless N. They used Cisco routers, so again, nothing cheap here.
The solution was simple, I needed to get the newer revision (yes revision, not model), of the Intel wireless N card that I had. Dell made that happen. However, since teh switch, guess what? If I push my wireless at home, then it fails to keep the connection. It works fine everywhere else I go, except at home. as I had the latest wireless card revision (checked with Dell), I had to switch my router. NOW, everything works above and beyond. So, all to say, it's a bit of a pain in the ass game to get it all working perfectly. And, while not explained here, but experience suggest that, newer techs, in wireless takes time to work well everywhere. That is why I am not sadden at all with the lack of wireless AC. And a smart move for Microsoft, because, while NOW wireless AC is fine, when the Surface Pro 2 was in development (meaning the hardware it will have will be at release) would have been junk, like other laptop with wireless AC. When wireless N is faster than using AC, and AC is plagues with wireless issue, and the range of Wireless N, is also affected, you know that there is some serious work needs to be done. It's too new, let alone wireless AC is still draft stages, let alone early ones. Remember when wireless N came out. Newer draft versions made consumer had no choice to scrap their 200$+ router, for a new one, and even wireless card in their system. talking about a mess.
So all to say at the end of the day, they are MANY factors that plays with your wireless experience, and one of them, is router liking your wireless card.
That is what personal experience suggests, and knowledge from other I am however no experts in the field.