I lol'd at how laggy it was.
Console fanboys never admit that Xbox's suck in specs compared to PCs.
Actualy, if minecrafts graphics were high rez, it would take a super computer to run it at a decent speed.
I like those high resolution texturepacks though.
I had one at one point, I think it was 256x256? Not sure. It was the highest out at the time, and I had it with Smooth Lighting (before it was official) and a few other graphical enhancements like Ambient Occlusion and reflectives. It looked beautiful.
Didn't lag but nothing does on my computer. I would've liked to see how much it would lag on an average computer compared to stock Minecraft as to see how the extra pixels punish the hardware.