In some cases, though, this is not pre-set.

Particularly here in the UK, a lot of traffic lights have (possibly capacitive) sensors buried in the road which detect the traffic passing over them. Lights will cycle early if no traffic is detected passing through a green, and/or if traffic is detected waiting at a red, especially at night when there is less traffic. That makes it hard to know in advance when they're going to change.

Another 2c from me: yellow times should depend on the speed limit.

So if you had a cake 30cm x 30cm x 10cm the FDA would let you have nine whole cubic centimetres of it be crap?

According to Jon Gruber, who has reliable sources inside Apple, AT&T pulled their weight to make this happen.

So, has the app been pulled worldwide, or just in the US store?

Well, considering he was at the British Phonographic Industry trying to drum up votes any politician worth his salt would tell them what they want to hear and therefore why they should vote for his party.