I have a Lenovo Thinkpad Yoga S240 factory equipped with this wireless adapter. OS is Win 8.1 (x64). My router is from TP-Link, Model 1043nd with 802.11n. I've encountered ping delays up to 90ms from the notebook to the router. Transmission speeds were way below expectation, when copying files my max. transmit speed was around 3MB/s (~24Mbps). Replacing the adapter is quite a task, Lenovo has a whitelist with allowed adapters in the BIOS, so a simple replacement like others have done sucessfully was out of question.
I've tried different driver versions but final resolution was achieved by uninstalling all previous drivers (hit uninstall in device manager and select remove driver software) until the Microsoft driver like in the picture above (16.0.0.62) appeared in device manager. As soon as you connect to the internet with this driver, Windows going to update automatically to an old version of the Intel driver. Then I've installed 17.0.5 and turned off U-APSD. And tadaaa, it works!
I have now 22MB/s for file transfers and speedtest.net states the full 125Mbps of my internet connection.
Pings are back to 1-3ms.