She can apply a citizenship at 4 years 9 months + citizenship process about 5months + your process about 3month total 5yrs 5 month  less(-) time she is being GC holder(say a year n half), final expected time about 4years

. But, She can apply you as spouse of GC holder (F2A) and
Currently NVC(National Visa Center) is working on August 2010.So, it's 2 yrs and few months back+processing time(3month)= around 3 years.