I analyzed a bunch of scenarios. As they reveal the draft picks in descending order, every team they skip must have gotten lucky and jumped into the top 3. This is obviously bad for Boston because it increases the chances they drop to #4. However, if they reveal the #4 pick and it isn't Boston, it is mathematically better for Boston to be in the top 3 with the longshots than the teams with good odds. If the top three are, for example, Boston, Miami and Dallas their chances of getting the #1 pick is better than if it's Boston, Phoenix and LA.