I recently discovered the wonderful program 'Directory Bind' which basically lets you redirect a directory from /sdcard to somewhere else.
(i.e. you external memory card!) This is fantastic since some games (Like Bard's Tale) consume a gig of /sdcard space and apps2sd doesn't work.
I also discovered that 'sd tools', whch allows you to test read/write to a directory allows specifying any directory, so can select a directory in /sdcard and test the internal memory speeds.
I noticed, for my Lexar Class 10 card (LSDMI32GBSBNAR), I got 10 MB/s write, and 20 MB/s read.
For my Note 1, the internal memory has only 5.4 MB/s write, but 47 MB/s read (!!!!)
I am now very curious how the memory speeds of the Note 2 are, and also what the speed of the SD interface of the Note 2 is.
But it's nice to get confirmation that games/whatever should load considerably faster if you keep them on internal memory.