Yes it has, mine too, I love cheap, easy rides. What makes that possible though is because Uber is essentially selling $1 bills for 75 cents. Uber at the prices it currently charges in most markets is not sustainable.
Will they eventually just charge that $1 or $1.10 for profitability? If so, would you still use them?
Since Uber will predict the fare, I can occasionally AB test in NYC. The rates are basically the same as taxis now, so far as I can tell.