I don't know what is available outside the main UK stores, but I only buy the main model Philips energy saving bulb. From my limited experience they are the only ones that do not require a noticeable warm up, have a decent light, they last for a reasonable length of time and they're also extremely cheap at John Lewis. I hardly find any other bulbs that manage any two of those.
I'm not surprised if they are also leading on LEDs in the mass-market.
(No I do not have shares in Philips, but I criticise companies often enough so I'll commend where its due.)