While Article 406.11 Tamper-Resistant Receptacles in Dwelling Units. existed in NEC 2008, it was revised as Article 406.12 Tamper-Resistant Receptacles in Dwelling Units. in NEC 2011. And it says Tamper-Resistant Receptacles are required in all areas listed in Article 210.52

National Electrical Code 2011

ARTICLE 210 Branch Circuits

210.52 Dwelling Unit Receptacle Outlets.
(A) General Provisions.

• kitchen
• family room
• dining room
• living room
• parlor
• library
• den
• sunroom
• bedroom
• recreation room
• or similar room or area of dwelling units

(B) Small Appliances

(C) Countertops

(D) Bathrooms

(E) Outdoor Outlets

(F) Laundry Areas

(G) Basements and Garages

(H) Hallways

With the following exceptions.

Ex.: Receptacles in the following locations aren’t required to be tamper-resistant:

(1) Receptacles located more than 5½ ft above the floor.
(2) Receptacles that are part of a luminaire or appliance.
(3) A receptacle located within dedicated space for an appliance that in normal use isn’t easily moved from one place to another.
(4) Nongrounding receptacles used for replacements as permitted in 406.4(D)(2)(a).

Please see this answer, for more detail. Basically if you have equipment grounding conductors enter the box, you add 1 fill unit.

Example Breakdown

In the example you've provided you have 12 if it's a box without internal clamps, and 13 if it has internal clamps.

Current Carrying Conductors
    Ungrounded (hot)            4
    Grounded (neutral)          3
    ----------------------------------
                                    7

Equipment Grounding Conductor       1

Clamps  (maybe)                     1

Devices                         2
                               x2
    ----------------------------------
                                    4
    ----------------------------------
Total                               13