That's the problem with the whole RAM theory. Also, think about this..... The complaint is with safari and seemingly NO other apps at all. So, high end games with huge graphics and action run like a champ but the web browser blows up with a few tabs opened? Just don't make sense.
It's a software issue, IMO.
Yes, switching off JavaScript improves things greatly, but of course no JavaScript means that most of the web sites won't work properly or at all. So there is something strange about the JS engine on Safari. iOS 7.1. is apparently just around the corner, so we will see if it makes a difference or not.
Still, having more than 1GB RAM would *not* make the iPad experience worse. That's the idea one gets when reading these defences for Apple's decision to go with just 1GB. There is no defence for going with 1GB in this day and age in what is a very expensive device and supposed to be somewhat future proof.
iOS9 is not necessarily much fun on a 1GB device.
Web browsing with "just a few tabs opened" can be quite memory intensive. Just have a look at the memory usage of Chrome. Easily 50-80 megabytes per tab in Chrome, although in Chrome each tab is a separate process so that increases the memory usage somewhat I think, but still.