-birey,
thank you very much for your reply and advise.

i was in the impression
concurrent i140 and i485 == premium concurrent i140 and i485
which is going to take same amount of time for i140 and i485.

So, going with premium concurrent i140 and i485, would take a short period of time if everything goes smoothly than just concurrent i140 and i1485!!

BTW how would i know if my case is solid or weak?
my master's degree in computer science from US, permanent employment in same field I believe is what
the focal point.

All I know is my company's immigration attorney has filed the perm under eb2.
I do not have any other information apart from it.

Thank you once again.