Btw...the typical response time for short-sales is 3 months.
i went through 4 short sales and beyond the ridiculous waiting period, some wait for last minute bids of higher than list price and/or decide to even take it off the market or make it a foreclosure.
the problem is that they can be sitting on your contract and several others that offer more knowing that they wont pick yours but wont tell you anything until 3rd party approval.
in the mean time, they can continue receiving offers but you cannot do another offer until you cancel this one...lots of missed opportunities.
i waited on 2 short sales for months and both foreclosed even though the seller was very motivated and all contracts were kicked out.
one house in fairfax list price was $200k and sold for $276k, had 26 contracts and sold after 9 months.
unless you can wait 6 months, dont bother.
Having said all of that - if you are still ready willing and able... the squeaky (but polite) wheel does get the oil. So, constant follow up will be the best way to keep things moving along. Send the asset manager a "bouquet" of cookies for their hard work - after that, I am certain you'll get special attention.