I just received my replacement Computer, after I had tow technicians here to exchange the wireless card. First it was same issue with the Computer, but after I had the latest driver installed, it did speed up, just like my old Insprion 13z.
Holds the connection and runs as it should be.
So far, it seems that the newer models, do not have this isssue anymore.
It took a long time, but it seems that was it.
Good Luck everybody.