I'm good but I cannot fix MS IE .
vBulletin is built to support all modern browsers, we won't make AP an IE only site either, and I'm not sure that would actually make much difference
BTW the primary reason for IE slowness is MS trying to keep backward non-standard MS support while attempting to support the W3c standards at the same time.
As I said above we have all sensible optimisations turned on, and regarding the vB inefficient HTML - it is compressed in transit and cached (365 days time-out).
There are things to improve IE performance - as stated above you will need to do some research (Google) and hack into the registry (which is a risk of course).