But right now, especially once Perl development really picked up, it might be time to "divorce" the two languages. It seems more like Algol60 vs. Algol68, or Modula-2 vs. Modula-3. Sure, there's a number in there, but it isn't just about the version of the main implementation.
Having said that, kudos to the Perl team. I really like that they now release new versions pretty regularly, which is a good sign to show people that Perl5 ist still very much alive and nobody needs to hold their breath for the time being.
If only I could use something more recent than 5.8 at work...
Non-Perl devs won't switch to Perl6 because the P word scares them.
So, yes, changing the name might be a good idea.
And making an enjoyable web-based tutorial.
But hey, generally it's not a big hassle, from a programmer's perspective that version ain't that outdated. About the only thing I really miss is "//="...