In June of 2012, the price for a one day base ticket was $89. That was good at any of the four theme parks at Walt Disney World and, of course, there was no date-based pricing back then. According to the CPI inflation calculator at bls.gov, that equates to $125.65 in August of this year (the latest month for which data is available).
At present, a one day base ticket varies in price depending on the park and the date, which makes direct comparisons more complicated. However, if you take the data from all four theme parks and all of the various daily ticket prices throughout the year, you get an average one day ticket price of $186.32.
Applying a little mathing to the situation, that indicates that the price today is roughly 68.3% higher than what it would be if you were only raising prices to keep pace with inflation.
Now, in fairness, those are averages and you can certainly get cheaper pricing based on the date you choose to go and the park your visit. For example, there are days when the Magic Kingdom one day ticket is $119, which actually puts it lower than the inflation adjusted price compared to 2012. Also, few people actually buy one-day tickets and the per-day pricing on multi-day tickets is better. Finally, you can often find better pricing than "rack rates" using sites like Undercover Tourist.
It seems clear, then, that Disney has indeed been raising prices quite a bit faster than the rate of inflation and they are doing so for profit purposes, not just to keep up with inflation. However, by being selective about dates, looking for deals, etc. you can still get tickets that are equivalent to what someone would have paid in 2012. So I think it is a mixed bag.