Here's a quick study;4 different strokers,all same 4.04bore,same 87cc total chamber volume, all same 6.123rod,all same 60* ICA
3.31stroke, Scr is 9.00,Dcr is 7.81@155psi
3.58 stroke,Scr is 9.64,Dcr is 7.95@159psi
3.79 stroke,Scr is10.15,Dcr is 8.41@171psi
4.00 stroke,Scr is10.66,Dcr is 8.85@182psi
As you can see, the Scr/Dcr/pressure is climbing through the roof. To take advantage of the trend, a bigger cam with a later ICA, will "eat up" the Dcr, so you can actually drive the thing.
I think the phrase "strokers eat up duration" or however it is said is simply a restating of what is going on here. Its actually the inverse. De-stroking eats duration, cuz the cam's ICA has to be continually decreased to keep the pressure up. Decreasing the ICA usually means less intake open duration. Or at least moving the installed centerline, or changing the LSA.
Just a thought.