The UE55JU7580 supports a newer WiFi standard than most TVs of a comparable spec and age to it. This TV supports an 802.11n wi-Fi standards, whereas most similar spec TVs that have been available for a comparable time to it support an 802.11a wi-Fi standards. In addition, this television supports an 802.11ac wi-Fi standards.
This TV's WiFi standard (802.11n) is actually the best supported WiFi standard amongst all TVs that have been available for a comparable time to the UE55JU7580.
The worst supported WiFi standard amongst similar types of TV is IEEE 802.11n.