Dell Inspiron 14 5459 power button needs 3 seconds long press to power up?

recently bought a Dell Inspiron 14 5459 on June 12, 2016 and first thing I noticed is that to turn on the laptop I need to press and hold down the power button at least for 3 seconds in order for the laptop to boot up, this seems strange, I brought up this issue at the Dell Store where I bought the laptop and the sales people there told me that they noticed this in most Inspiron models.  Is this normal?