A variety of retail-watching experts are churning out Black Friday sales facts, figures and customer inclinations, and while it wasn’t a rip-roaring Black Friday compared to previous years, it wasn’t all that bad — particularly for the hot-selling consumer electronics sector. Comparison shopping site PriceGrabber.com, for instance, is reporting that adverse economic conditions have motivated value-driven customers to boost online traffic 11 percent over last year’s Black Friday.