Flying out of T2 for the first time today and a few observations I thought I'd share.

1 - I take the Heathrow Express and T1 was very convenient. T2 is a long walk from the Heathrow Express.
2 - A lot of UA and Heathrow staff available to point you in the right direction. I don't know if this will last since it just opened this week but it was nice to see them out in force.
3 - I was hoping UA would get gates close to the terminal, but alas they are as far if not farther than the ones in T1. The signage suggests 20 minutes to get from the departure lounge to the gate and they are right.

I didn't get a chance to check out the lounge due to time (see point #1 above) so not sure if I would have got in as a *A Gold or UA 1K in Economy.

I only popped in to the London Pride store as it was something I'd not seen in T1 and I love their product.

I'll be interested in hearing experiences from others and any tips to shortcut the trek.