1) Do we say "The information is correct as of 28 September 2010." or "The information is correct as at 28 September 2010."?

2) "I spoke with him yesterday." or "I spoke to him yesterday."? Someone mentioned to me that both sentences are acceptable but 1 of them is more formal. Which is it?

Thanks.

3 answers

1. "as of"

2. Both are correct. I don't see that one is more formal than the other.
2. I would say I spoke with him yesterday is more formal.
I think the difference in number 2 is whether you spoke to him with little or no response from him or whether it was a mutual conversation -- with him.