My experience of driving in the US is that stop signs are used a lot, so people get numb and treat them as Give Way/Yield signs (where you don't need to come to a dead stop, but must give way to any oncoming traffic).

In the UK, Stop signs are only used when there is limited visibility/blind corners, so if you see one, you know that you definitely need to stop. Once you step and creep forward, you'll realise why a stop sign was needed.