Since I have been retro-surfing with the PowerBook, I have also been experiencing a somehow familiar (albeit unpleasant) feeling. Pages get stalled, nothing renders until I'm beginning to wonder whether the wireless connection has been interrupted, and more often than not the CPU load indicator goes up through the ceiling. It's like there's something wrong with the web nowadays.
It didn't use to be like that. This computer was SUPER FAST compared to its contemporaries back in 2005; even compared to Macho PC laptops. It was still pretty decent when I used it last, in 2010. Heck, I used it pretty much exclusively for news/blogs reading back then! I wouldn't have been able to do so at this speed; I would have got desperate and gone back to the desktop computer.