While I can understand the arguments for this, in practice the approach frustrates me to no end.
Worse are authors whose writing has no excerptable lede. Gina Kolata and mumber Morgenstern (health / Well articles in the NY Times) especially do this.
I find some old-school journos -- Dan Gilmore particularly comes to mind, I've called out a few others in G+ posts -- still practice strong ledes and heads. Many newer ones start with "My latest at <some website somewhere> read more".
Which ... tells me fucking nothing.
Lede with your lede. Trail with your link or call-to-action.