My understanding is that it depends on the person, but the C-section has been associated with lower initial milk production in some cases. Some people think it is because of the meds/strain of the surgery on the body; some people think it is because of the delay in the time to breast for the baby (since mom often goes to recovery and baby goes to the nursery vs. giving the baby a chance to latch right away). Some docs will give c-section moms a chance to nurse (usually after clean up/Apgar/ointment but before the baby is taken out of the room) - you may want to ask for the opportunity. If you are doing skin-to-skin before clean-up, you can take the opportunity then (some hospitals allow this - there are different opinions about everything!)
Personally, my milk took a while to come in and I had trouble producing enough, but it could have been me/stress and not my emergency c-section. Things that helped were a steady regimen of Mother's Milk Tea, drinking lots of water, working with a lactation consultant, and taking Reglan (which has depression as a side effect for some folks but did not affect me in that way). (My doctor mentioned she had low production with her first and great production with her second - natural birth both times - so I am hoping this time will be easier.) KellyMom.com and the La Leche League both have information about things that can help if milk production is a problem.
I'm glad they are keeping an eye on you and doing what they need to in order to keep you and your bean safe. Good luck!