Of course it is going to appear different. The advertisements were prepared specially to make it look enticing and had a professional photographer taking them whereas the real life were simply prepared in the mimimum amount of time so you could get your food faster. Hence the term fast food.
I used that on the guy I sit next to in maths :)
He just laughed at me.
And then a guy who sits a couple of seats in front said
'I wish I could find your derivative so I could lie tangent to your curves'
:rofl: