Are you sure this is not only due to the fact that you've flashed a new rom (you say flash so it's not OTA, I suppose) so the system is freshly installed? I s

Are you sure this is not only due to the fact that you've flashed a new rom (you say flash so it's not OTA, I suppose) so the system is freshly installed? I should try it on my Nexus S that has become sluggish as hell (and I've tried different custom roms)