Well Pumpster I have played rugby at a high level myself and I can tell you weight training sessions happen little as part of training.
2 sessions per week max that would typixally 40%-50% max weights do bench power cleans deads maybe stuff like that etc.
The bulk of their training is done on the training field, technique is heavily scrutinised, positioning is of total importance.
Simply put being an athlete purely will not allow you to make it to the top in Rugby. You have to have huge co-ordination levels and imperious technique to be a top level player.
Yes they look like shit compared to our US counterparts but it is a brutal game and with an aspect on all 15 players being able to play in almost any position as the game flows more there isless emphasis on conditioning in the gym.
ta ta