Just recently an engineer at Verizon Wireless hinted that the company will delay the handset to add LTE radio. Later on he confirmed about LTE support but was hesitant about the actual device and its delay.
4G coverage is massively growing nationwide and we are about to see the main metro areas covered by the end of the year. And if you are preparing for a big holiday shopping season keep in mind that with LTE on board, the HTC Merge will be Verizon's first 4G enabled handset.
source: Android Central