True! We took our three y/o GS to WDW last Feb and I asked this same question. Nope! We had to pay full fare for him.

The couple across from us had a little girl about a year old. They were talking to us about how if they had flown her as a lap child she would have been free, but they wanted her in a car seat, so had to pay full fare for her. They too had asked about discounts for a small child and were told there were none. This was on American.