Perhaps, but same cant be said about SLBMs..which by nature of its design, has to be preloaded with a warhead(nuclear or otherwise) before being lowered into VLS tubes of a Boomer.
Fact is most of the estimates of nuclear readiness of either country are more than a decade old i.e based on the fact that during Kargil war Americans found out Pakistani SFC was readying its nuclear weapons conveyed so to Nawaz Sharif .
No new studies have been conducted, as to nuclear readiness of either.
Pining your defense on the hopes, that one will get adequate warning time, when the other country starts mating its weapons is beyond foolish.
For India has started deploying Indo-Israeli Swordfish missile tracking radars with a range of 800 Km(Virtually covering entire Pakistani airspace)..however there is not much development in this sphere in Pakistan.
Even then this might give Indians 5-7 mins warning at max..and if India is able to positions Geostationary satellites, which can detect missile flare..that might give an additional minute or so, but then that's that.