Andi Gutmans, founder of Zend which drives PHP, takes a swipe at Perl 6 in this interview:
So we are anticipating a long rollout cycle for PHP 6, and we did not want to take the same route that the Perl project did, with project contributors still working on Perl 6 I think six years later. People make fun of Microsoft, but take a look at Perl 6. . . .
Sure, PHP 6 may have a shorter release cycle than Perl 6 has, but at the end of it all, we’ll have Perl 6, and you’ll still have PHP.