Anyway, I'm not 100% sure that this is the study they're referring to in the release, but nevertheless I stumbled across this very detailed report from last month, detailing performance of both fixed and mobile broadband. It's in Portugese, but I think most readers will be able to get something out of it, or at least enjoy the nice graphics. For those less adventurous, a summary of the findings is here. I particularly like the observation:
"With regard to upload speeds it is seen that the speeds of mobile technology are higher than those provided by fixed technology."
I've got a 3G dongle which typcially sits idly by at home, as I ponder just how slow a cable modem upload can be. It would be nice to bond the two together somehow.