Mr J, the long winter nights must just fly by...
I agree though, it is odd. Maybe the air in different parts of the world causes differences in wake turbulence dissipation.
Whenever we in the tower are about to receive an aircraft with less than the required spacing, the second aircraft miraculously becomes "visual" and all is well again! C208 2 miles behind a heavy, issued a cautionary but still flies on or even below the glide.
