We'd already heard that Vizio has vaulted back into first place among LCD TV manufacturers, but a new series of numbers compiled by the folks at DisplaySearch is now shedding a bit more light onto how much the flat-panel TV market as a whole has surged over the past year. Apparently, about 7.2 million flat-panel sets were moved during the first quarter of 2009 alone, which represents a sizable 23% increase over the numbers from the first quarter of 2008. DisplaySearch also expectedly reconfirms Vizio's number one status, although its figures are a tad more cons