That's crazy!! I just compiled a Hello World app in FutureBASIC 5. Compiled for Intel Mac OSX 10.4 and up is 102k. Compiled as Universal OSX 10.4 and up is 152k.
You're basically compiling an Xcode Carbon app though. No Runtime. Even the old FutureBASIC 4 compiler was bigger for a PPC only Hello World app because it had some runtime code.