do argentinas pronounce the S??

Hello. As Argentinian I can tell that its all a question of whom you hear speaking

For example in Buenos Aires people tend to pronounce too much the "s", while in the rest of the country we do not pronounce it as strong. When you hear "eta bien" is not that the S is not pronounced, but that the "T" is stronger and makes the S weak. Note that the two words you wrote have and S before a T

We do not pronounce the "s" sometimes between two words. For example "las horas" sounds like "lajoras", or "los dias" sounds like "lojdias". Its a kind of aspiration used only in the country but not un Buenos Aires

Hope you understood, I'm from Argentina and don´t write english properly

Many countries in Latin America (well, in southern Spain, too), "swallow" or "forget" their S's... Argentinian Spanish often does this, too.

I'm from Peru, and I think Argentinians talk weird. We don't talk like them here.