Just want to take note on what I did to enable syntax highlighting in VIM for Perl6. I followed this excellent procedure. Thanks Ovid.
Then if you are using NERD_commenter.vim plugin like I do. This is the best commenter for me by the way. You need to add another file type for perl6, as follows:
elseif a:filetype == "perl6" call s:MapDelimiters('#', '')