Would you be able to shoot a video of this? I sincerely doubt the HD7 can render pages faster than the One X, even with the less-than-stellar stock Android browser. If it is the case, might want to give Chrome a shot.
I actually wouldn't be surprised if it were true.
Smartphones have become largely overpowered when it comes to web browsing. (It's like how a computer with an i7 won't load a page faster than one with a Core 2 Duo.) While the One X has the extra ooomph, it's largely irrelevant. My phone actually loads webpages faster than my computer some times.
The One X probably does a host of things faster than the HD7; but, faster web browsing has rarely been one of the new praises for the new "superphones". Many tech blogs even skip the entire what-not about fluidity at this point and dive straight to the benchmarking.
(Do note that I'm not attacking cutting edge specs. The new SoCs are more battery efficient and good for other things, like playing games or intensive apps. They're just not particularly good for speeding up your web browsing. It's like arguing which phone can make a faster 2G phone call at this point.)
EDIT: At this point, I would like to point out that it irks me how some tech enthusiasts, especially Android users (but even most WP users), are completely disillusioned with the capability of specs. When a new, faster phone comes out, some users automatically start assuming that the old phone has trouble doing many things it did perfectly before when nothing about the phone has changed!
For example, one Android fan told me that Windows Phones such as the HTC Titan could not multitask due to hardware limitations. I quickly pointed out how ridiculous that statement was considering that the Nexus S and HTC HD2 are two of the most popular modding devices and multitask just fine.
The most annoying part about these comments is that many of these people actually owned the old device they are bashing and experienced how it worked. Just because a faster phone comes out doesn't make your old phone any slower!