After some reminescence and analysis of the discussion I came to bold conclusion that defending strong Sapir-Worf hypothesis is very much akin to racism. Basically, you prohibit someone not fluent in the language of your choice the ability to see the world just like you do or even better.
Just to give one food of thought - most of human languages are two-level (like van Wijngaarden two-level grammar) with the extremely outstanding examples like Nigerian (and I heard there are fixed-grammar languages here and there, but they are rare). Two-level grammars are Turing complete and thusly you can express any concept in most of them. The expression effort will differ at start but if concept is important enough it will be expressed concisely in every one of them.
To quote B.Stroustrup "users require LOUD SYNTAX for new features and succinct syntax for familiar ones". Just like real languages evolve.