Depends on which you do a poll of polls, there are a couple of different methodologies - either the last set of polls in a month, or the last six polls by all the involved pollsters, at the moment doing a poll of polls base don the latter methodology is likely to depress the Yes position as it includes an oldish Ipsos-Mori (though it looks like that will be shortly remedied). The other issue with poll of polls is that for a long time they've merely generated a false middle through wildly different methodologies - that's lessened now but again, with ipsos in there you are still likely to see a big No lead even though everyone else reckons it's even stevens.
based on the run of the last few polls from PB, Survation, ICM, YG and TNS I'd reckon it's 50/50 - we've seen Yes in the range 46 to 54 over those polls but removing the outliers sees yes in the range 49-51. I'd also go back to something I noted previously, that big yes swings were in Younger groups and C2D2E percentiles - both groups likely to make up a lot of the newer voters who've been undersampled in BPC pollsters.
Against that, you've got the 'silent majority', 'shy no' narrative of which there is absolutley no proof of it being a major phenomenon, but there is the more real possiblity of Yes shedding a couple of points based on previous referendum performances.
How do those two factors cancel out? Does the yes group have a soft edge? Given how the Yes vote held up after last weeks blitz you'd think not much, but then they might waiver when in the actual booth. Will those big swings to Yes in lower income and younger age groups seen by the RIC and the BPC pollsters actually turn up on the day?
I don't think there is much in it, I don't on the face of it see a reason to suppose that No has an advantage at this point, that might change tonight with TNS due out at 5pm and you'd assume the YouGov one out late tonight for publication in the papers tomorrow.