Study CCIE Lab First then CCIE Written

An interesting post caught my eye today. It's located at http://www.sadikhov.com/forum/index.php?showtopic=143419 . MarkinManchester's post on studying the lab first then the written has its merits. Now I wonder ... am I doing the right way by studying for the written and doing labs occasionally the right way to go? Nevertheless I am 25% done with the examination guide book and have been doing virtual labs with Internetwork Expert's audio series. Still I wonder should I continue with studying the written first then concentrate on the lab or the other way around.