It's pretty competitive. From what I have heard/read, some programs have Step 1 score filters (e.g., 230+ gets an interview), others even have research filters, etc. For more, go here:
ortho chances - Student Doctor Network Forums

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I used to pray and pray for a bike and never got one. Later I learned that God doesn't work that way... so I went out and stole a bike and asked God for forgiveness.