The Sharp LC-43LB371 supports a newer WiFi standard than most mid-size TVs that are a similar age to it. This TV supports an 802.11a WiFi standard, whereas most comparable spec TVs that have been around for around the same time as it support an 802.11n WiFi standard. In addition, this Sharp TV support an 802.11b and 802.11g WiFi standard.
This TV's WiFi standard (802.11a) is actually the worst supported WiFi standard across all TVs of a similar spec and age to the LC-43LB371.
An 802.11n WiFi standard is the best supported WiFi standard across comparable types of TV.