This is coming from Soros who has a credibility problem in the US, so this --Soros: Putin Told Kiev to Fire on Protesters--might need to be taken with a grain of salt. But there were some allegations of something like this from Putin during the Orange Revolution. And, of course, if it is in print it has to be true, right?
We'll just have to see if anything else comes out about it. I don't think though the final chapter has been written on what the real risks were to the protestors on the square.