I personally use /join 0 in place of /partall, because it seems faster. Some IRC servers throttle you for stacking too many channels in /join and /part, but doing /join 0 doesn't have that effect.
I dont think anything should be done about this. It is a server protocol issue and should be left as such. Users will learn about it the hard way and will be that much more educated . . .
Don't type things other people tell you to.
- Raccoon