Not only under 6000 but and with about 10000 unconfirmed transactions the network is working really fast in very reasonable confirmation time. But the way I see it is only matter of time. That is, last two months we had If I'm not mistaken, about 3 times where the network was under spamming attack. Unfortunately I think that most days of the week and especially the working ones this situation will be repeated and probably with greater frequency. This could only be corrected after the resolution of the dispute about the segwit or blocksize adoption. Till now I always check the unconfirmed transactions and I try to do all of my transactions, if is possible, only this period of time.