No, only the ones that have 'Less than 1% fat' on the packet are, like spicy sweet and sour and tomato and herb.
Ones with 'Less than 2% fat' are 1 syn, like the creamy Thai (I think, from memory) but definitely < 2% = 1 syn
Ones with 'Less than 3% fat' are 2 syns, like the creamy cheese ones...