* Knight Vinke says Darty not showing any urgency * Darty likely to miss lower end of FY profit expectations * Acting CEO sees no pick-up in markets in 2013 * Q3 revenue down 2.5 pct, like-for-like sales down 0.5 pct * Shares down 6.5 percent (Adds detail, recasts lead, acting CEO, analyst comments, shares) By James Davey