Forum Post: Slow Wireless on 2012 XPS 15

Symptom(s): The later symptoms may be seen if a Wi-Fi access thorn (AP) or broadband Wi-Fi router doesn't properly support the Energy Save Polling (PSP) feature:

Source: http://en.community.dell.com/support-forums/laptop/f/3518/p/19431327/20030034.aspx#20030034