I am on the Unlimited Bronze 12 plan. I did a speed test this morning around 9:30am and got over 18Mbps. This afternoon I did another speed test and got over 16Mbps at 4:00pm. This on a Friday afternoon. These are some of the fastest speeds I have seen in a while.
I've been noticing faster speeds the last two days also. I'm on the unlimited silver 25 plan and just clocked a download speed at 33mbps! Even achieved 18mbps down at 6:00 yesterday evening—totally unheard of the past few weeks/months. (normal has been between .5mbps and 2mbps.)