Alphabet and Numbers by 18 Months???

Daddy: So you're pretty doggon ridiculous, little one. You started off loving sign language, and now you're loving your letters and numbers. You LOVE them. So much that with 2 days before your 18 month birthday, you already know all 10 numbers and about 2/3 of the alphabet. When we're out in public and you see letters and numbers you know, you point them out and say the letter's name. You especially love "zero" and "ess," mostly because you eat "zero" cereal (Cheerios) and you know what letter your name starts with. Mommy and daddy are so proud of you and amazed out how much you love learning!