Earlier in the thread I mentioned that I use this IDE as well. The only other IDE that compared in terms of speed was Zend 5.5, which was the version before ZendEclipse.
There is one thing that PHPED does that drives me insane to no end though. When it auto-completes a function it puts the caret between the parens, which is fine. But when you type the closing paren yourself it adds an extra paren instead of just overwriting the existing one. I tried to find a setting that controls this but couldn't.
Example:
file_get_contents(|); // # Typed: file_get_cont<space>
file_get_contents('foo'|); // # Typed: 'foo'
file_get_contents('foo')|); // #typed: )
// and now there's two closing parents