wow...is a handshake really that big of a deal?

I shook hands with a new coworker and it felt like he was trying to crush my hand. Then he responded with "whoah!!! lets try that handshake again" I guess he wanted me to squeeze back harder because when i did the second time he was like "that's better". When I shake hands i like to grasp but not really squeeze other peoples hands. I suppose that makes me "weak" right? haha..how judgemental. Oh well...I'm just gonna have to show them how bad@$$ my cashiering skills are. Then we'll see how much that handshake really mattered.