One thing I am a bit puzzled is that if the denial rate of EB1 (especially EB1C) is lower in 2011 than 2010, then why are we having so few EB1 approvals in 2011 as compared to 2010. Is it because the processing time of EB1 has increased substantially in 2011? Also, the primary to dependent ratio of 2.99 for 2010 (as Spec mentioned in his post) seems to be a bit on the higher side. I think Spec's earlier argument is very intuitive to understand; this year, we have 9 / 12 month worth of EB1 approvals and in the coming years we expect to have 12 / 12 months of EB1 approvals (assuming we consider similar processing times for EB1).
Now, if EB1 usage in the next year is 35K (from Spec's calculation), then the overall spillover EB2-I/C can expect is 8K (EB2-ROW+MP) + 6K (EB5) + 5K (EB1) = 19K (assuming things don't change for EB5 and EB2-ROW). EB2-ROW has a big backlog too; so, I am not sure whether it means fewer FA from EB2-ROW to EB2-I/C. This is surely a very rough calculation and has too many unknowns but with this assumption, the total # of visas that EB2-I/C will be receiving is of the order of 25K (incl. regular quota of 5.6K). I will assume that there will be 3K - 4K pending EB2-I/C applications (up to Aug'07) + approx 4K PWMB (assuming 1K will be cleared this year) + 3K - 4K EB3 -> EB2 porting. So this will account for 10K - 12K visas up to mid-Aug'07 that will be allocated next year. This will leave us with around 13K - 15K visas for the period after mid-Aug'07. Not sure how far the PDs need to move to consume these ~15K visas; maybe around early 2008? But, again this is a very very simplistic calculation and might have some flaws in my assumptions.