You really need to work on this!

  1. Open launcher

  2. Starts an update for < 1Mb

  3. Go for a smoke and a drink.

  4. Come back 2-3 mins later

  5. Not even 10% done on a 225MB/s connection.

As per the title: You really need to work on this !!!

Your systems not being able to deliver a 1Mb download on a 225 MB/s connection in 2-3 minutes is pathetic (by all means Blizz, suggest another descriptive word that you deem is less offensive that conveys the same concept).