It can take 3-9 months (or more) for his counts to start trending up, a sign that he is responding to the treatment. It will take years for the marrow to recover. Hopefully, Promacta will help accelerate this.
If he is still taking prednisone, that can cause a false rise in neutrophils.
Good luck! I know the waiting is hard!
53 yo female, dx 9/08, AA/hypo-MDS, subclinical PNH, ATG/CsA 12/08, partial response. small trisomy 6 clone, low-dose cyclosporine dependent