One may notice that Gelb has carved out "Premium" sections at every level except Family Circle, where a "Front" section was separated last season. (To be fair, the Family Circle split maintained the old price for Front and lowered the price for other seats.)
For those wondering what exactly "Premium" means (besides a chance to charge more), I believe the following is correct:
|Orchestra Premium||Rows A-T, all center section seats and first two seats to left and right thereof [UPDATE: see below]|
|Center Parterre Premium||All boxes, first row|
|Grand Tier Premium||Row A, center two sections|
|Dress Circle Premium||Row A, center two sections|
|Balcony Premium||Row A, center two sections|
Note that Orchestra Prime has pretty much been gutted, while the effect above Parterre is fairly minimal -- except, I suppose, to those with longtime front-row subscriptions.
UPDATE (8/19): A commenter notes that Orchestra Premium may just cover the eight seats (two per side per aisle) adjacent to each aisle, in the specified rows.
UPDATE 2 (8/20): Maury braved the pileup and offers an evocative account.