Re: your link, I'm not sure that a wage hike that took place during the recession is the most accurate indicator.
As to the rest of your comments, there's no one-size-fits-all answer to them. How big is the business, how many employees, annual earnings, profit/loss etc. A small business with a few employees just trying to stay afloat will be affected by an increase, sure. A business like McDonald's or Wal-Mart, not so much. As a matter of fact Wal-Mart's recently been looking at supporting an increase in the MW. People working for minimum wage are going to put any increase right back into the economy and that's a good thing. Click on this
chart of MW increases, they've taken place in good times and bad and the economy still continued to grow. According to one source the economy has grown nearly 60 percent in the past 20 years, and we've had five MW increases in that time.