Are you still getting these spawns consecutively by watching the whole kill cam?
I can see be a possibility and not a placebo. In theory, watching the full kill cam gives the game more time to analyze the placement of players, killstreaks, and objectives, therefore giving a better spawn. Skipping the kill cam would force the game to quickly choose a spawn without much time to analyze, therefore in theory giving a worse spawn.
Its a far-fetched concept, but it won't hurt to hit Google and see if this happened to others. I'll report my findings when possible