Tethering-slow data/ping speeds all of a sudden!!!

[tx_dbs_tx]

I am posting this in the Palm Pre section because that's my current device and my issue is with my Palm Pre...
I have been tethering with my Palm Pre (which is a RevA device) via usb for a few weeks and now all of a sudden my data speeds are total crap! I have been testing at mobilespeedtest.com & speedtest.net everyday. I was getting anywhere from 2mbps to 5+mbps and now it gets at best 1mbps but most always around .55mbps. My ping was typically between 60 something to 160 something and now it's WAAAAAY higher at at least 200 to 300. This happened after I updated WebOs to 1.1.0 which may have nothing to do with it. I'm thinking that the new Sprint "5gb data cap" could be the cause of this. I'm thinking maybe Sprint decreased the bandwidth or something because it's rediculously slow now. I obviously can't call Sprint on this issue so what I would like to know is if anybody else has noticed a big decrease in their data speeds while tethered via usb. Please post any results and comments you may have on this because I'm about to make a big decision wether to stay or leave Sprint if this is in fact the reason for my data being so slow now.