I also have a 'conditioning' regime any time I buy a new 4-pack of NiMHs. Incidentally I ignore the 'ready to go' selling point of hybrid cells - it's a nonsense, just assume they need charging before use like any other rechargables.
1. Run them through the 'refresh' program on my Technoline charger. This discharges and recharges each cell repeatedly until it detects no improvement in capacity, it usually takes around 48 hours to complete, at a medium-fast charge/discharge rate.
2. Discharge them again to some low but safe level, say about 25%.
3. Trickle charge them on the lowest setting (200mA on the Technoline, ideally I would go slower if I could), for at least 24h.
4. Mark the cells off in pairs, matching capacity as closely as possible. Subsequently I always use cells in their marked pairs.