The Sharp LC-60SQ15 supports an 802.11a WiFi standard which is newer than most comparable spec TVs that were launched around the same time as it. Most TVs that were released more than two years ago support an 802.11n WiFi standard. This television also support an 802.11b and 802.11g WiFi standard.
This television's WiFi standard (802.11a) is actually the worst supported WiFi standard amongst all large TVs that are a comparable age to the LC-60SQ15.
An 802.11n WiFi standard is the best supported WiFi standard across comparable types of television.