I just checked all the prices on my trip I'm pricing out for Memorial Day and no increases there. So no across the board increases at least. I had the rate pages printed out (order summary page from the Checkout page. I expand it so I can see the night by night price, and screen print).
ETA - I'm pricing Pop, CSR and WL, so one from each category. They all stayed exactly the same for all 10 nights.
Also, checked the 6 night trip we have for April, just to check and it's the same also, at BWI.
Maybe the rates are going up for later than Memorial Day trips? Ours ends 6/3. Did they increase them for closer to the opening date for TSL?