Intel's recent Ivy Bridge processor schedule has the following third-gen Core i7 and Core i5 processors releasing on April 29th: Core i7 3770K, Core i7 3770, Core i7 3770S, Core i7 3770T, Core i5 3570K, Core i5 3550, Core i5 3550S, Core i5 3570T, Core i5 3450 and Core i5 3450S.
Meanwhile, the following third-gen Core i5 processors will release in June: Core i5 3470, Core i5 3470S, Core i5 3475S, Core i5 3570 and Core i5 3570S.
We are not sure whether Apple is holding off on a summer iMac lineup in order to include the June processor models, or if it will still use the April 29th models but is holding off on a release for reasons relating to quarterly revenue stragies. Nevertheless, DigiTimes reports that these new iMacs may include new Anti-Reflective (AR) screens manufactured by G-Tech.