Originally Posted by
corporate-wage-slave
You are right, T2 is on paper slightly better than T5, T2S is also a lot closer to the main terminal compared to T5C. I think there is some psychology at play here: if somewhat gets over to T2S, they think "oh, my gate must be nearby". But it's a long satellite and if they then discover they have to trek on to gate 41 then it gets a bit draining.
Yes I was surprised myself but BAA kept us perfectly informed with their 'very conservative' walking time boards! Did they say 20 minutes I think? I did it in around 6-8, can't remember exactly as i didn't time it.