Two things come to mind here, first off, IE 6 has been around for sometime now and for the whole of it’s life has been under heavy attack by miscreants determined to gain access too it’s operations and by way influence the users of this browser, Inversely Microsoft and the protection industry has although it be after the fact, managed to keep apace with these threats and in the end produce a product that while it has faults, some of then glaring, actual for the most part works well, and is simple and effective at what does, is well read about and users have a vast database of historical information available if it does not so find it relatively easy too manage the utility.
Second IE 7 is an unproven product, has no historical database, is not easy to use once you get past the flash interface it offers and is already coming under heavy attack as those with ill intent, bolstered by their experience with IE 6 are transferring there interest to it.
As a general user I found IE 7 to be over engineered, already the victim of numerous ‘Hot Fixes’, not at all intuitive in it’s operation, Caused many once closed avenues of attack to be either re-opened once more or difficult too protect against, Add to this the constant uploading of information back to Redmond and it did not take me many hours to realise that a return to IE 6 was in order.
Microsoft has yet again released another very bad product, falling back on the blame game once more in an attempt to cover this fact while creating yet another industry wide boom in protection and further problems for users.
Is it or more to the point will it be worth the effort, eventually yes as time passes IE 7 will become like 6 a reasonable product but for the present while support is still offered I for one will be staying with IE 6 or using Firefox as an alternative.