I read in a Perl 6 mailing list that "Yes, in Perl 6, everything is an object". Is this still the truth?

As it stands, yes, everything will be an object. I doubt very much this will change.

Does anyone know in what ways Perl 6 OO design will be different from Ruby OO design?

Know one really knows since we've yet to see Apocalypse 12 ;) I'm not too hot on the ruby OO system, or perl6 OO system for that matter, but here's a short list of differences

• perl6 will have multiple inheritance (correct?) and ruby has mixins
• there won't be a distinction between class and method variables in perl6
• instance attributes will just be normal variables (via has?), so attr_* won't be needed to access/modify them
• perl6 won't specifically distinguish between class/instance methods

They might not necessarily be completely accurate, but it illustrates that perl6 and ruby don't deviate a great deal in the overall OO system.
HTH

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broquaint