Um, no, it isn't. Half litre of tea at 95°C, add small dash of milk at 4°C temperature of the mixture is now 94.5°C. Repeat until all the milk is added and the mixture is now at about 75°C. (all depending on initial starting temps and relative volumes)
Or quantity of milk at 4°C, add a splash of tea at 95°C, temperature of mixture is now 5°C. repeat until all tea added, mixture is now at 80°C. In the second instance the hottest the milk ever gets is the 75°C. In the first instance some of it gets up to 95°C and denatures more and tastes 'funny' - like using UHT milk in your tea tastes 'funny' vs. the pasteurised stuff.
(Icon with a dash of irony, added at any stage of the reading you like!)