I have a little wooden plaque with those three words on it.
And of course, the answer is often “yes.”
If you’re waiting on an unavoidable delay, then you’re not stalling. If you’re making things better in a way that the customer will notice, then you’re not stalling. If you’re finding that the spaces in between are giving you joy and sustaining you, then you’re not stalling.
But…
If you’re holding back and looking for a reason why, and that reason is replaced by another reason, then… you might be stalling.