Well, it depends. If you got boys not because of that one attempt, but in spite of it, you don't want to do the opposite on that!!
Let me illustrate what I'm talking about using hypothetical numbers.
Let's pretend that wearing a hat sways pink 60% of the time and wearing NO hat sways blue 60% of the time. So you could TTC wearing a hat and get a boy (because you get boys 40% of the time even with the hat!). The solution is not to then take off the hat, because you'd end up in that case 60% likely to get a boy. So let's say one attempt sways pink about 70% of the time, but you did one attempt and fell into that 30% of boy conceptions. 3 attempts sways blue about 60% of the time. You would not want to do the opposite and have lots of attempts because you'd end up even more likely to conceive a boy than you had been prior.
Doing the opposite only works when what you were doing in the first place was actually swaying. It is totally possible to end up worse off by doing the opposite. That's why I think it is best for you guys to do what has worked for most people most of the time instead of trying to do the opposite, because not only does it make you crazy (in that control freaky way that may sway blue) it often doesn't even work because the things you do the opposite on may not even be why you swayed.
I think I posted this for you already but in case I didn't here's the case against timing
http://genderdreaming.com/forum/gend...le-timing.html