WED blocks are downright slow. Try building something with just 100 blocks visible and see what the frame rate is. Now build the same thing using a model-only level. The difference in the frame rate is so obvious, there's no competition between models and WED blocks for who is better.
"You level up the fastest and easiest if you do things at your own level and no higher or lower" - useful tip
My 2D game - release on Jun 13th; My tutorials
