I think a lot depends on the format of exam your child takes, and whether the school is a super-selective, as to the impact the date-change has made. Through being on this forum and regularly visiting all the regional boards, I have a finer and fuller appreciation of the range of tests and preparation that DD's fellow 11+ candidates have to go through
Some regions have VR, some have 2 VR papers, some have NVR and VR, some have Maths, English and VR - or all four. Some have multiple choice throughout, some standard format, some, like part of Essex, have a mixture of Multiple Choice and Standard, so the options, requirements and choices for preparation and familiarization will be different. For for some people, the idea of more than a couple of familiarization papers, seems an unacceptable burden on their child, whether they're facing 1 VR exam of all four possibilities.
Whilst it's certainly true to say that all the 11+ candidates are in the same boat, in terms of the exam being brought forward, they're not all in the same boat, in terms of what they face on the day. Perhaps it's logical to suggest that a child who sits one VR paper for a catchment GS, will have had to do less "catch-up" than a child who sits an NVR/VR/English/Maths combination for a super-selective, as a result of the date-change?
It had an effect on us and our time-tabling plans - how could it not, when you have to somehow squeeze 8 lost weeks of preparation into your schedule?
Unless they decided to change the date again, it will realistically only effect the 2013 intake; so 2014 parents may feel the "voyage" and "trials" we've endured since the announcement was made, is irrelevant to them.
I suppose one has no other choice than to take the pragmatic approach - accept it, deal with it, do it and move on to life's next hurdle