Don't know what I was thinking with those Porsches... Must have been half asleep or something - or figureing something that old couldn't be so fast... Definate mis-information on my part.
Still, i'd say most of the cars you've driven are in the 7 seconds range
6.5-7.7s lets say... Definately not the case that the majority are sub 7.00 sec.The times for the new Accord kinda scare me... doesn't seem right for the family sedan, the rubber must melt off the wheels on that car. Don't know if you posted the age of the accords either originally (I4 and V6 I think is all you said) I've been in the I-4 from 1994 and it's slow. I've heard good things about the 2000 V6 from a friend.
And we all know that the Germans like to give conservative times for their cars, so publications will have better times.