Of course, so then don't blame the browser, blame the hardware on which it runs. Even good software will naturally struggle on inadequate hardware, and the presence of the latter doesn't make the former automatically poor.
Just goes to show you how much of an adverse effect ad-heavy sites have on our browsing experience. Not only that, effective ad-blocking is a resource intensive activity, with current implementations often sucking up huge amounts of RAM and raising CPU usage by several notches. For details read the following Mozilla blog post which sparked off a firestorm, as well as Wladimir Palant's response and a Chrome developer's comments on Reddit:
https://blog.mozilla.org/nnethercote/2014/05/14/adblock-pluss-effect-on-firefoxs-memory-usage/
Even if AdBlock Plus could run on Windows RT the Surface RT would struggle, and on sites that bombard users with ads perhaps even the Surface 2 would as well. I can clearly see the effect when browsing with Chrome even on a not too old Android tablet with AdBlock Plus installed (which was removed from the Play Store by Google for obvious reasons).