Swim Goggles Defying Gravity? Here's Why - I think

Do swim goggles change swimming dynamics? I really wouldn't have thought so, but I recently switched from one brand of goggles to another and with it, the goggle size bumped up a size or two. Now when I try to tuck in my chin and "swim downhill" as I once heard a coach tell his team, my head seems to want to stay near the surface (in freestyle). I'm wondering if the new goggles, with their larger lenses, is trapping a larger pocket of air against my forehead and forcing my head up toward the surface. Whatever the case, something is definitely is making me feel like I must work harder to keep my head down. Any thoughts?