Its all luck when it comes to good shares. 2 days is not much of a sample size. For example one of my test units has been up for 44 days...its best share is 78k.
oh for sure, my best share since I bought it is less than 5k - have not ever had a higher share on litecoin. have been on 4 or 5 pools with it.
note: it has found almost a dozen digibyte blocks though.