An insider at a "major big box retailer" asserted Friday that sales of the BlackBerry PlayBook had been perilously low. The unnamed but reportedly reliable source claimed to BGR that RIM's tablet had missed the store chain's sales targets by over 90 percent. Dissatisfaction was also supposedly very high, he said, with returns at a "much higher rate" than the Motorola Xoom, whose own return rate was higher than average at seven percent.