Our productivity tests represent tasks commonly performed on desktop workstations.
ABBYY FineReader 10
In FineReader, which is really well-threaded, Intel's Haswell architecture performs a little better than were expecting it to. The speed-up is only a few seconds, granted, but it's definitely quantifiable.
Adobe Acrobat XI
Looking at the PDF creation benchmark using Adobe Acrobat XI, these numbers are certainly solid. Picking up 15 seconds in a single-threaded test from Sandy Bridge to Haswell is nothing to scoff at. As someone who regularly converts PowerPoint presentations to PDF before I send them along, this metric resonates with me especially. It's worth minutes per day of my time.
Our Visual Studio compile test runs noticeably faster with Haswell, opening up a multiple-minute lead over previous generations. This is certainly one of those tasks that is affected by a new processor architecture; it's both long and really well-optimized for threading.
Fritz speeds up most during the transition from Sandy Bridge to Ivy, where it picks up an extra 100 MHz and support for DDR3-1600 on top of the minor tweaks Intel made to the architecture itself. Similar improvements moving to Haswell further nudge performance forward.