First, how old is he? The difference between a 24 month old and a 35 month old is huge.
Most boys aren't ready to learn until after 30 months. That's "MOST". Some are ready sooner, some aren't ready until nearly 4.
Did he show most of the readiness signs?
Not liking a wet or dirty diaper is not a strong sign. Newborn babies don't like wet and dirty diapers either.
Staying dry all night is also not a sign. Many, many children will do this before they are ready to learn and many, many children will still wet years after they are day time trained.
Here's a pretty good list... http://parentcenter.babycenter.com/toilet-training-readiness-checklist-2-years
at 6:33 PM on Dec. 21, 2008