I am having sluggish performance and crashes, paticularly in Safari on my iphone5, ipad4 and ipad mini. As requested by Apple i have sent diagnostic info. I have found slugishness, but not crashes and freezing, can be fixed by not using the enhanced boice which presumably uses less cpu power. Seems to me ios8 and enhanced voice will not run smootthly on older devices like it did with ios7. Anyone else found this?