Yes.
The OT believers were not BORN of the Spirit.
John 3:3 Jesus answered and said unto him, Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God. v5) Jesus answered, Verily, verily, I say unto thee, Except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. v6) That which is born of the flesh is flesh. That which is born of the Spirit is spirit.
Greek words for "born", "born again":
gennao - 1) of men who fathered children A. to be born; B. to be begotten a) of women giving birth to children; 2) metaph. A. to engender, cause to arise, excite B. in a Jewish sense, of one who brings others over to his way of life to convert someone C. of God making Christ his son D. of God making men his sons through faith in Christ's work.
anagennao - 1) to produce again, be born again, born anew 2) metaph. to have one's mind changed so that he lives a ne life and one conformed to the will of God.
1 Peter 1:3 Blessed be the God and Father of our Lord Jesus Christ which according to his abundant mercy hath begotten us again unto a lively hope by the resurrection of Jesus Christ from the dead, to an inheritance incorruptible, and undefiled, and that fadeth not away, reserved in heaven for you who are kept by the power of God through faith unto salvation ready to be revealed in the last time.
1 Peter 1:23 Being born again, not of corruptible seed, but of incorruptible by he word of God, which liveth and abideth for ever.
paliggenesia - 1) new birth, reproduction, regeneration A. hence renovation, regeneration, the production of a new life consecrated to God; a radical change of mind for the better
Titus 3:5 Not by works of righteousness which we have done, but according to his mercy he saved us by the washing of regeneration and renewing of the Holy Spirit; which he shed on us abundantly through Jesus Christ our Saviour; That being justified by his grace we should be made heirs according to the hope of eternal life.
apokueo - 1) to bring forth; A. from the womb B. give birth to; produce
James 1:17,18 Every good gift and every perfect gift is from above, and cometh down from the Father of lights, with whom is no shadow of turning. Of his own will begat he us with the word of truth, that we should be kind of firstfruits of his creatures.