I just got 3 new 3S 2200mah 25C Turnigy lipos for my heli - they were all at 3.8+v/cell.

Storage is a range, not a precise number. The lipo expert on RC Groups got the 3.85v started and has said more than once, its just the average, nothing special about it. This is what Hyperion recommends

"Storage - Lipo should never be stored fully charged, or with less than 50% of capacity remaining. We strongly recommend Hyperion EOS chargers, as they have automatic STORE functions to insure that the packs are in the range of about 60%~70% capacity (3.78V~3.92V resting voltage per cell). After returning home for the day, simply use STORE MODE to achieve this automatically. Batteries are best stored in a cool, dry environment (2~20 °C or 37~68 °F)."