@oristarA,
well, you're right, but it's can be a subtle sound.
In America, when people are just speaking casually, a lot of times the d sound is dropped, but it's not something you would do if you wanted to be clearly understood, or were trying to convey a definate meaning.
It's kinda (as opposed to "kind of"
) a familiar way of speaking.
If someone asked you "what's for supper" you might reply "chicken n' dumplings" or "steak 'n potatoes"
Just in the same way I might say to a friend "he was runnin' down the street", as opposed to "he was running down the street", it's just a letter that gets dropped when you're not paying attention, and the meaning would still be clear.
On top of all that, there are so many different accents in America, what might sound like a letter being dropped to one person is heard perfectly by another.