[msbarnett]

Only the jump to 4.0 is excruciating; 4.1's performance is on-par with 3.1.3

[bryanh]

It merely helped in my situation. If 3.1.3 ran at 100%, 4.0 ran at 40-50% and 4.1 bumped it back up to 60-70% at best (in my experience).