I just did it to my OM. I'm running reppards CM7. I'm not getting increases to the 500+ range like some of the guys on the Samsung Admire thread are getting, but still nice.
The six for 2/29 are the ones I did today. Three @ the original setting (mobile IP) and three @ the new setting (simple IP).
My Android history: LG Motion 4G, LG Optimus M+ (rooted), LG Optimus M (rooted with various roms but always came back to Reppard's CM7), Archos G9 80 250GB