Shouldn't surprise anyone. When they announce very publicly that raids start on Sunday, they will probably start sooner, to catch people off guard.
Keep in mind, deportations under previous administrations (real and imagined) were meaningless because they could just flood back in.
But with POTUS actually starting to secure the border and cut off foreign "aid" to hostile groups that enabled the travel of these illegals.
This time, they are not coming back. Certainly not the way they did before.
Slow and steady. POTUS knows.