I wouldn't. Otherwise they would just give us all the same AC adapters for all Powerbook and iBooks. However, they don't do this despite the fact it'll save them lots of money, so I wouldn't bother trying.
I'm also judging this by what they say about mobile phones. Some Nokia phones can fit almost ANY Nokia AC adapter, but the fact is that it'll decrease your the lifespan of your battery if you use an incorrect AC adapter type. Note that mobile phones also use Li-Ion batteries. So yes, it may actually work, but expect your battery to last for several months less than it would have if you had just stuck with the proper AC adapter type.