H1B, H4 Visa

Good day everyone

I have attended for visa stamping 2day @ london US embassy ,,and was issued a
221 G....i really dont understand y they did it (?) ,till now ...coz they have nt asked me 2 submit any further docs ,,the VO has simply striked off all the docs required and said me that they need to review ma case......
actually vn i went 2 counter i hav observed that VO is lil bit ? mark faced .....it seems he cant get wat he needs from the system
ma experience

vo: gud mrng

me :reciprocated

vo: typing some thng in da sys

vo: asked me to excuse for 2 secs and went off from da place and came back aftr 1 min

vo: how long u been in UK

me: from past 20 months

vo: nearly 2 years

me: yes sir

vo: typin sum thng in sys and again left da place and came back with one of his mate
Then lady vo comes in to screen and she askd me wat is my role @ my employer

me : i said prgramr analyst & given brief description abt ma roles

VO : then VO and his mate has talked for quite a while and lady vo suggested Vo
get all da docs from me and need to review the case ...

vo: wat did u do in uk

me: said i have done ma MS in compu science

vo: typed in sys and asked me to giv all da docs wat i hav abt ma employer

me: submitted all da docs

vo: given me da 221g form in which he striked off all the req docs section and said
me that they need to review ma case , nd they will inform me the status aftr
da revw
me : thanks very much
vo: bye

can any one help m wat wud b the next step of embassy ,,,,,,how long it takes to get any kind of result,,,and can u pls help me to figure out wat might b the problem actually is....

my employer has more than 300 employees working for him
All ma ceritificates and employer are original and genuine
I don hav experince and ma petitn says dat
i hav done my B.Tech in Compu science and engg
MS in compu sci from a reasonably accredited gud university in UK

thanx very much 4 havng ur valuable time