Indeed, android can be run starting with the TyTN II, not with TyTN I/Hermes. Too low in memory and cpu.
I have the TYTN/Hermes. Tried wm6.5. It's nice but very memory consuming. Eventually ended up using wm6.1 roms.
Owner of Galaxy S4 i9505, used to run FoxHoundRom3.5, now CyanHacker v3.0