The MacBook Pro Mid 2014 Retina has an 802.11a WiFi standard which is better than most similar spec laptops that came out around the same time as it. Most laptops that were launched around the same time as it have an 802.11n WiFi standard. In addition, this portable PC have 802.11ac and 802.11b and 802.11g WiFi standards.
This notebook PC's Wi-Fi standard (802.11a) is actually the worst Wi-Fi standard amongst all MacBooks that have been on the market for more than two years.
An 802.11n WiFi standard is the best Wi-Fi standard amongst similar types of notebook PC.