Hate to say it, but I agree. My 3GS was a tank; sold it in perfect working order after it migrated through four family members. 4S on/off switch died (despite being in an OtterBox case) and battery would only take half charge after three migrations. 5S got dropped on kitchen floor before case arrived and the gold metal frame bent out of square making the on/off button hard to use. Anecdotal, I know, but it does seem as though strength and durability may be slipping.