I never had this problem in 1.0 and I don't in ARR and by large the issue is only affecting a select group of people - I've ran Ifrit nearly 100 times and Garuda and Titan in the teens, no one I've ran with had these issues. The only time I seen it happen:
Garuda Ports
>Blm stands there, Garuda readies her attack, BLM decides to finally try to hide behind a pillar.
>Blm dies.
>Blm blames latency even though everyone else moved as she ported and didn't get hit.