Citing issues such as sluggish growth in disposable incomes and the government shutdown, IBISWorld forecasts Thanksgiving and holiday gift spending to be weak this year. Revenue generated by the Thanksgiving holiday is expected to increase only slightly from 2012, according to the market analysis company. And while Cyber Monday sales are anticipated to increase strongly by double-digits in 2013, this growth rate is deceptive, as it is mainly due to consumers’ continued shift away from physical s...