actually other than install size im VERY surprised with 10.1 it is not using hardly much more ram than fox it does unless im using it inside a browser and its def fast!! its been ages since adobe reader ever found its way even close to my systems but this is running very very well!!! and its using WAY less ram than pdfxchange does... i know i can limit the ran pdfx uses but then it runs choppy and is just not smooth imo
Used foxit as a small alternative for many years after seeing Adobe getting slow and bloated, but now v5 is bundled with crapware (this gets more annoying and aggressive every version I think!?) and much more important: on my system (Win7, dualcore AMD, SSD) foxit v5 is not faster anymore than Adobe Reader 10.1.0. - So I find myself surprisingly back in the Adobe Reader X camp.