I am not sure if my post is exactly what you are referring to but here is was I was able to test.
I am using an LG Android phone, and I downloaded ExtGPS to output NMEA strings to my laptop/tablet via Bluetooth. Note: some apps can do this via USB and some apps appear to be available for iOS.
I am using 10.0, I will be switching to 10.1 in next 6 months or so. I am using the out-of-the-box Windows WPF Application with heavy modifications. I was able to successfully click on Connect to GPS in the app.
My app so far collects point data, I can walk around with my android phone, which will provide the GPS information to the laptop and collect data. I don't need to use an alternative GPS device from other companies like Trimble or Garmin. Yes, I still have devices from them, but your post regarding using a phone as a means to get GPS NMEA strings made me look into this further. I am happy to say that for my clients and stake holder that they can use their phone as a GPS if they want.
I hope this helps in any way.