The article and interview at FutbolMLS.com is in Spanish, but that's probably the language that automated translators work best at providing decent work. The gist is that Fredy Montero moved to Colombia to work his way into the National Team picture and had some struggles early due to the elevation and playing style changes he needed to make.
He sidesteps the issue of transferring to outside of Colombia, but indicates that his contract with the Sounders is for two more seasons (through 2015) and he would be happy to return in January. If he does not return then he still wants to come back to Seattle at some point to add more goals to his Seattle Sounders FC account.
Extraño mucho a Seattle ya los fans.
So while there are rumors of a transfer to Portugal, it would seem that Montero would be happy to return to a city where he moved his family, met and married his wife and still owns property.
It is not much, but it is something. That something may just be as simple as "I enjoyed my time there and would be happy to go back someday."