Sales of the HTC Thunderbolt was outselling the iPhone at Verizon by a slight margin, BTIG analyst Walter Piecyk said Thursday [free reg. required]. After checking anecdotally with 150 Verizon stores, he found that 61 percent claimed to have sold just as many of both phones in the past week. The Thunderbolt was more popular when an imbalance came; 28 percent of all stores said the 4G Android phone was more popular, while 11 percent said Apple was stronger at their shops.