PHP-based design houses PART II

My original intention was to raise the issue of the quantity (and quality too) of development houses who are promoting the use PHP (vice java/jsp or coldfusion) - rather than the quality of PHP itself. We all know that PHP outperforms other engines in development and operation. My point: will I, with an RFP (specifically stating requirements for PHP/MySQL/Apache) for website development work, get responses from major dev houses - not just coders in their basements? My second point, or more like a thesis: would a certification program help provide credibility to PHP and the developer pool. Thus, raising the prospect of development houses validating PHP as a formidible platform option. Look what the certification scheme has done for other arenas... I know this is a little off topic, but just want to throw my opinion out there for comment. Thanks.