I do ‘feel’ a bit different depending on which language I'm thinking in. (On the other hand, it would be impossible for me to perform a double-blind test to find out how much of that is due to placebo.) But sufficiently strong forms of the SW hypothesis sound like bullshit to me. (Most of the times someone points out some exotic feature of some language purported to influence its speakers' thought, English has that feature too. And I mentally classify anything starting with “X language has N words for Y” as rubbish, trash, junk, garbage, waste, refuse and litter.)