I'm sure you alreay know as it is from the same thread you linked to earlier today, the Sky employee confirmed that 1m users got the EPG upgrade on 12 June. I'm guessing this is in the Reading area as thats the postcode he gave for the first batch of upgrades.
He said no confirmed dates for the next batch so I guess my hopes that I would be next as I'm down the road from Reading were perhaps optimistic
