While watching American movies and TV series, I notice that in dialogue very often the usage of a proper adverb is replaced by the corresponding adjective (in the case where the adverb is formed by the suffix "-ly"). I don't have lots of examples, but one would be to say
You came across very strong.
instead of "strongly".
Thanks to Anthony's answer, here's another example:
I'm gonna go to the store real quick.
Is this a general tendency in current spoken American English?
I believe this is not the same as this question, where in the same word context both an adjective or an adverb can be appropriate. In my example sentence, it is clearly about a property of the action (adverb) and not about the person performing the action (adjective).