It looks like philsward has found a reasonable fix for this issue. I would encourage others to try his suggested configuration if you haven't done so yet.. I've been running on 17.0.1 with the power save option enabled all day now without a single problem. I'm using the AC 7260 dual-band mini-PCI Express card in an XPS 15 L521x Laptop running Windows 7 Pro 64 bit. I've run it through at least 20 sleep/wake cycles and it's connected immediately upon waking every time. I'm also getting much faster connections than I did with the 17.0.3 driver. I get 866.7 Mbps most of the time with occasional fall backs based on signal quality.but never lower than 600 Mbps and it's usually back up to 866.7 the next time I check.
D