As I mentioned in the other thread, the reason why it would be quicker this time is because they only have to update the lines and not the DSLAMs.
First time around they started in Jan, but the first few weeks were updating the cabs (ie the 10 mins downtime). They didnt start on the lines until Feb - dates/figures are in other thread - so in reality it took them just slightly under 2 months to do the lines.
This time they only have to apply Mk2 to the lines so they started end May and by that comparison alone it should be complete mid/end July... however its already well over half way - You only have to look at MDWS to see that