When I wiped and installed, I saw that it was doing EXT4 itself... didn't think that I'd have to do it manually (although I did see something on Lee's website that was for flashing EXT4).
From what I read in the thread, I'm not sure if the patch does all of the partitions as EXT4, but it's only the data partition that is necessary as the system and cache partitions are formatted during the isntall/upgrade of the ROM.
Sounds like you had a similar experience with LeeDroid as I did with ARHD.
