i know this is a bit late but i mine about 9 ltc a day with 4 l3+'s and 1 5 cube titan at coinotron. the 5 cube titan is missing 1 cube because the pci-e connector blew out so im working on getting that fixed when i get some free time during the weekend. the titan is mining at 320mh/s for the time being so i would say in or about 1.5-2 ltc per day with the l3+ with variations depending on pps and what pool you use not to mention fees and so on.

i had to reboot one of the miners after running for almost 5 days....one of the boards showed all x's but that miner runs cool at 58 degrees c -62 degrees c per board so after a quick reboot everything was back to normal. i noticed before i rebooted it when the miner does this the hashrate listed on the main page is weird. for example it showed the AVG hasrate at 450mh/s (i underclock this one because of the noise like i said before) but the RT column showed 1.5xxxxx and the x's are random numbers. coinotron reported it mining at 370mh/s so maybe the board issue comes from some interface error after running for a long period of time? maybe an "auto reboot every few days" option  would be a good thing to have but so far i dont consider this "issue" much of an issue. if the temps were high i would but i think bitmain did it right this timeby spreading the hashrate over 4 boards instead of cramming a ton of chips onto 3 boards. there is a huge temp difference between the s9 and l3+ and that cant all be due to the difference in coin being mined. i honestly hope they implement this 4 board design into their future btc miners to give them a bit more room to breathe....it feels like it would reduce the number of failures others have had and that its way more forgiving temp wise since they run at such low temps to begin with.

EDIT:

I forgot to mention my l3+'s came with a beaglebone controller again....not the controller bitmain made to replace the beaglebone on the newer gen s9's. this is cool mainly because it means if you have your own full fledged beaglebone controller with a working usb and controller for the tx and power (bitmain uses bare bones beablebone blacks with no usb and other components to save money on making them) we should be able to use a wifi dongle again! right now im using tp-link external wifi ap's that need 5v power (the internal controller is the same as the one used on old avalon miners) which is a pain because i need a long usb cable and a pwer brick for the tp link controller but if you use the beaglebone with usb and a compatible wifi dongle you should be able to connect up to wifi networks just fine. I havent ever flashed a beaglebone black or backed up the image so if anyone has the bitmain firmware image (not the upgrade package but the full firmware image) i can flash one of mine an see if wifi works on it and report back. i dont suggest using wifi unless you need to and for 2 of the miners i would need to run wifi so i dont have long ethernet cables running accross the room.