Game speed question

XXLetaliaXx - Raging Tide

So I have a pretty crappy laptop, not a good gaming machine at all.
I can play PWI on lowest graphics quality with distance set to max and have little lag and no gamplay hindering problems.

Yet I play other games that are much smaller in size, have trash graphics by comparison on lowest graphics settings, with very few people online, and they lag like they have something to prove!

So what is going on? why does PWI run so much cleaner than other games of lesser quality?

SylenThunder - Twilight Temple

PWI's game engine is built on standards over 10 years old. It doesn't use the GPU like newer games, and doesn't even support multi-core processors.

XXLetaliaXx - Raging Tide

Cool cool, thanks.