Colliers PKF Hospitality Research released a revised forecast yesterday, calling for the average U.S. hotel to post a 2.3 percent increase in net operating income this year. This is the first such increase forecast since 2007, and it follows a 37.8 percent cumulative drop in profits from 2007 through 2009. The latest forecast is based on the strong demand experienced by U.S. properties in the first half of 2010. According to the September issue of PKF's Hotel Horizons, the company is predicting a 4.6 percent jump in revenue per available room this year, driven by a 5.2 percent increase in occupancy. Revenue is tempered by a forecast 0.6 percent decline in average room rate.