Looks like there is another reason behind this other than just the rom that I was using. It was documented that the rmnet roms had slow upload speeds and the new rom from MattC uses ppp net which is faster. But look what I also just found out, HSPA+ went live!

“Today, T-Mobile USA, Inc. announced the continued expansion of its super-fast mobile broadband network to 100 million Americans in more than 55 major metropolitan areas.  T-Mobile’s HSPA+ network – which offers theoretical peak throughput speeds of 21Mbps – is now available in Boston; Erie, Penn.; Fresno, Palm Springs and San Diego, Calif.; Miami, Fla.; Richmond, Va.; Spokane, Wash.; and Topeka, Kan.  “Our new network offers today’s available 4G speeds to more people than any other wireless network in the country and we’re not done yet.  We are now on pace to more than double our HSPA+ footprint – reaching more than 200 million people by this year – with plans to offer 42Mbps theoretical speeds in 2011,” said Neville Ray, chief network officer for T-Mobile USA.  For more information, please visit http://t-mobile-coverage.t-mobile.com/coverage.”