Hingis not just because I like Lindsay...
Lindsay has won 4 titles since she came back and beaten some really good players in Hantuchova, Jankovic, Ivanovic etc...
So it has been a fair comeback (except the injuries)
Meanwhile, Hingis actually LOST 4 titles, bringing her total DOWN from the pre-comeback level, and only beat a panda bear and muskrat in exhibition play, and she got to use the doubles alleys whilst her animal opponents used wooden rackets.
I fail to see how 3 Tier III and 1 Tier IV title compare with 2 Tier I and 1 Tier III title, or how Lindsay's super impressive 3 matches at slams compare to Martina's 3 slam quarterfinals. By any objective standpoint, Davenport hasn't been a top player in her comeback. Hingis kind of was.
I mean, it's one thing to say that Davenport has had a pretty good comeback (she has!) but it's entirely another to say it's been better than Hingis. Even if you compare just the first 10 months of their comebacks (roughly the period Davenport has been back on tour), Hingis had a better stretch.
That all said, I do think Davenport had a more impressive comeback. She was older when she retired, pretty much immobilized at the time, AND had a baby.