I'm being consistent with my Dr. Jekill/Mr. Hyde driving personallity - hyper-miler before 8am - often agressive afterwards.
The irony of this is I did not consciously do a pulse and glide. Yes, I'd get down to 39mph, then go to 45 or 50.
My morning commutes, I'll go as low as 50mph, but that's about as low as I go on an open Dallas freeway for fear of getting killed.