Oh, yes, exactly the same - just TTC#2 now and DD will start school next September 
I can see the pros and cons for all age gaps, though. I know someone with a 14m age age, she said it was a nightmare when they were both babies, but as they're getting older it is getting easier. And they will hopefully be doing similar things at all ages, whereas with a 4-5 year gap the kids will constantly be at different stages of their lives.
I can definitely see how getting sleepless nights, breastfeeding and nappies out of the way in one big 3 year go is probably more sensible though. With a now reasonably self-sufficient, potty trained sleeper, the idea of sleepless nights fills me with dread!
But then again, I absolutely detested pregnancy and was really very happy to get back to work after mat leave, so for me, having a small age gap would have really tested me to the limit.