I disagree.
Lenders have no incentive to "slow down" refi's solely because of the qualifications of the borrower, nor would it make sense for them to "fast track" funding of refi's for particularly strong borrowers. You just lukced out that the lender was not busy this Feb (few were, as that would have been before the rescue plans went in effect:
Obama launches mortgage modification program - Apr. 15, 2009) In 2003 that was on the "ramp up side" of lenders building their systems and staff.
What I have seen is a mortgage business in shambles from top to bottom. The number of originators ballooned and has shrunk and grown again, as have the staff to process those apps, as have even the investor sources. That last bit is the most troubling...
The recent dip in rates SWAMPED lenders and they did some triage to try and put NEW HOME SALES on the top of the heap. That meant refi's went to the bottom, if those refi's were locked and the funding sources have now dried up as they have their fill of new home loans the lenders are in a pickle -- people want what they don't have, cheap money.
Now in the broad sense there is still a lot of cheap money available for some things,
Honda May Borrow About 100 Billion Yen for Car Loans (Update1) - Bloomberg.com (I think I'd like to be a Japanese automaker if I could borrow at 0.24%....), but the normal pools of dough for home loans are highly constrained by lenders whacky over reaction to years of "lend to anything that looks like it is still breathing"...
Basically mortgage servicing companies are part of a pipeline. Some of the money that they use comes from funds they earmark for new homes, other for refi, and others from restricted sources like FHA. When their risk managers and regulatory people see they are sending too much new business into one area or other they actively redirect the workload so that they can keep a handle on the profitability, insurability, and quality of these loans. Lack of oversight in all these areas are what shut down the IndyMacs and Countrywides...