You may be right, that's just what we had heard from some people in the industry
April and May LLS averaged $20 over WTI, so the pure numbers they were throwing out may have been true at the time. June was $14 and July is about $12.50. It's trending lower because of the glut of light sweet crude that is hitting the gulf coast from Bakken, West Texas, South Texas, the GOM, and in some cases, West Africa. Hurricane season is tricky, but the general trend will be lower because of the infrastructure relieving pressure on Cushing (like Athanatos said). These are amounts paid at St. James though and they don't account for transportation, margins, etc., so the the netback at the lease will probably run at least $5 lower than LLS, and possibly a lot more depending on who is in the middle and exactly where the crude is coming from as well as quality.
I just don't think it's something to bank on from here on out because in all likelihood that spread is only going to shrink as a long term trend.
Crude is starting to see an oversupply situation to that which natural gas has gone through and the oil rig count needs to shrink or things could get ugly.