I'm the only developer for a company that has created (and continues to support) some huge sites that require(d) a great amount of development. For the majority of these sites, IE6 is not falling in usage. It has hit - and stuck at - around 30%. Alienating 30% of a client's potential customers is just not an option.
Do you happen to know what kind of userbase that is?
Since IE7 is pushed pretty aggressively by windows update I would think there must be a few large corporations in there who have rejected the update thus far?
At least I want to think that because IE6 being stuck at 30% gives me the shivers. On our sites IE6 has been constantly dropping since about December and is now at around 18%. That's still too much but at least the tendency is right here...
I can't be too specific but one site in particular that I maintain has a big user base in education (from nurseries to universities) and I think it's very likely that this heavily influences the IE stats.
I know from experience (I've worked as tech support in schools and a college) that these establishments are normally the very last to push out upgrades to things like browsers. There's a big "if it works, don't touch it" attitude.
> Since IE7 is pushed pretty aggressively by windows update I would think there must be a few large corporations in there who have rejected the update thus far?
Don't forget that IE7 isn't available on Win2k, which is still being used in academic and government organizations a far bit.