Yes, that is the right driver.
Note that the Dell tech performed several configuration settings with the driver that I would not have known to perform.
Here's how my driver is currently configured:
802.11n Channel Width for band 2.4 - Auto
802.11n Channel Width for band 5.2 - Auto
802.11n Mode - Enabled
Ad Hoc Channel 802.11b/g - 11
Ad Hoc QoS Mode - WMM Disabled
Bluetooth AMP - Disabled
Fat Channel Intolerant - Disabled
Mixed Mode Protection - CTS-t0-self Enabled
Preferred Band - 3. Prefer 5.2GHz band
Roaming Aggressiveness - 3. medium
Transmit Power - 3. Medium
Wake on Magic Packet - Enabled
Wake on Pattern Match - Enabled
Wireless Mode - 5. 802.11a/b/g