Not everyone wants to use a PC to browse. Not everyone can. It's important to have an Amiga browser, even if its not the most powerful in the world. What matters most is stability and efficiency. Compatibility matters too, but its an unreachable goal with M$ rewriting net standards every other week.
Anyway, my own tests with IB weren't so impressive either. Javascript still looks rather limited. I'm still forced to use Opera or Mozilla on my PC for websites IB still won't load correctly. (I would never use IE6. I grudge the HD space it takes up and I can't even uninstall the thing).
Oh well, at least now I have a copy of IB that doesn't crash.