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There are 5 flavors of Disco:
Chrome
IT
Miles
NHL
Secured
Your opening CL doesn't matter which one except for Secured since you're putting your $ into it for your limit. If you like Chrome then apply for Chrome. They have the same UW requirements and will assign you a CL based on the info you submit.
The range for approvals around here can be $500-$22000.
When my girlfriend applied for her Chrome in October of 2016 with no credit at all, her first card, they also granted her a 1,000 SL. She never had any other cards, not even a secured card. So I would perhaps say they are fairly generous with the Chrome? But she could have also gotten lucky, who knows. She had zero credit history when applying, and no regular bills in her name at the time either.