@i_am_ybba , Hi , Yes yuor agent maybe correct regarding the time line of the visa, but the current trend for visa 190 seems u need to wait a little bit longer unlike the visa 189 some applicant receive there grants in less than 2 or 3 months.
It all depends on the documents you have submitted and it might be your onshore applicants these will help you up to receive grants early.
Goodluck cheers