I was under the impression that a G router will only talk in all G or all B, therefore if you want G speeds you need to make sure that all the cards on your network are G's... but recently a co-worked said he thought that routers now were able to run in a mixed environment type mode, giving G devices G speeds, and B devices B speeds.... is this true? Do all G routers do this or is there something I should be looking for in the specs to know it does that?