Is subliminal messages a thing of yesterday since most people can't concentrate enough to be effected by it?

You don't need to concentrate hard on anything to get a subliminal message through.

couldn't this mean they are more effected? They would come out tomorrow not understanding at all why they ask something?

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[c=#4C0073]you're bombarded by it everyday but very few notice it .. that's why it's subliminal :p[/c]