First off....I am WAY excited for you guys! WTG Marco!!!! The first week sucks, but after getting over that hurdle it isn't too bad.
It was about 2-3 months before she would initiate telling me. She would always answer yes or no when asked pretty much right from the start though, so I was content with that. I just kept asking her if she needed to go, and if she said no I would tell her "you tell mommy when you need to go potty ok?" Eventually she started telling me. And when she told me, she meant NOW!!! LOL. So it was literally drop everything I happened to be doing at that very instance and running her to the toilet as fast as I could! LOL.
She also had a time or two where she would go backwards, but I never gave up and within a couple days she was back on track. So if you find Marco regresses a bit, just hang in there, keep consistant with what your doing and he'll get back on track.
And one thing I noticed too is that after months of being trained with no accidents, Kaia went through a phase where she was having 1 or 2 accidents a day. She was like that for about a week or so. Her OT had told me that it is probabably due to a growth spurt. she said she noticed that Kaia had grown alot since she saw her (we see her once every 1 or 2 months) and it's very normal to regress a bit in toileting because the body is just adjusting itself. Makes sense to me I guess.
Hope that helps. sorry for the novel, I have a hard time keeping things short! LOL
Lacia - Mom to Nolan 5, Kaia 3-DS, Pierce born May 29/06