There is no answer to the question that will not cause offence to the pro Sony camp on this site. I will be subtle and say simply its the not the developers fault that Sony released a console with a overly complex architecture with very poor development toolset in comparison to their opposition.
The Cell has been understood since day one its just not worth the time and effort for most developers to master it, its not like they're ND getting big paychecks from Sony to paint the PS3 in a better light.