Long time ago i had similar situation. My kingdom had over week long war with another kingdom. There was Kingdom wanting to notice us right after our war. I asked them for give us extra time and not vulture but answer was: how after 6 days prepare you can call it vulture. So they gave us notice and we wared them. We won war from big disadvantage. After war end both kds had similar size just reversed from pre war. So KD vulture us asked for CF. I told them now both kds have 4 days for prepare so lets have fair war this time...and answer was: NOW YOU WANT TO VULTURE US.
So how you see people view change from side they are and i have see it many times. So to sum your question: Yes 6 days is good enough time for KD to prepare but its still vulture considered they got DB and retard long war. Kd you notice is normal to feel upset because you (Spartans) used unfair situation for gain advantage. If they use harsh words take it and don't complain. You got your WW and land so be more gentle now.