Yep, no big deal to go as long as 12 hours. It's better to wait 12 hours and pitch at the proper temp (below 70 for most ales) than to rush pitch into a warm wort anyway. I wouldn't suggest going much longer than 12 hours but I have gone as long as 24 without any problems.
It all depends how clean your process is. Agree 12 hours will not hurt anything.