Fireworks is recommended as the source is full editable in Fireworks, not in the softwares you mentioned.
Rocket Theme use Fireworks as it is the best in respects to designed web designs. If you are capable of using the other softwares, why not use them for logo design.
Most members just want to change the text of the logo, not an elaborate design so Fireworks will be the best to do this.
Well i have Fireworks CS3 and Photoshop CS3 extended and i feel as thou i have more freedom to design with Photoshop than i do with Fireworks, Don't get me wrong Fireworks is Awesome, but i just feel restricted in certain aspects!
But i don't create websites (Hence the membership on here lol) so i can't really comment, But i know what you mean James when you say its better for the source is fully editable in Fireworks!
I used to wonder the same myself because I am an oldschool photoshop boy myself.
I found fireworks a bit constricting at first as well. But after I got used to it I don't even load photoshop up now except for the rare Text modification (which PS does do better generally)
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