>> I'm no kernel hacker, but doesn't that make the GP argument better?

Nope. Dynamic linking is done each time the program is loaded - the kernel calls out to the dynamic linker to open shared libraries, resolve symbols, create jump tables & the like. Static linking is done once (at compile/link time). When you execute a statically compiled library, the kernel just loads the text, data & bss into memory and more or less starts executing main(). Much, much simpler, although you lose the ability to do things like ASLR.