I wouldn't be so sure about that. I used a bible commentary by Gill for this verse:
I will come to you; in a very short time, as he did; for on the third day he rose again from the dead, and appeared to them, which filled them with great joy. So among the Jews, disciples, and the world too, are represented as fatherless, when their doctors and wise men are removed by death. Says R. Aba, (x) and so sometimes others, concerning R. Simeon ben Jochai,
If we read further, Jesus said similar:
Joh 16:16 A little while and you will not see Me; and again a little while, and you will see Me, because I go to the Father
Now when the Spirit came, they didn't actually see Jesus. You can't see the Spirit. So it must be referring to Christ's ascension, or perhaps second coming.
And if it couldn't be any plainer that the Spirit and Jesus are two persons, here Christ talks of the Spirit not as Himself, but as another who will glorify Christ, and will speak not of Himself but what He hears...
Joh 16:13 However, when He, the Spirit of Truth, has come, He will guide you into all truth. For He shall not speak of Himself, but whatever He hears, He shall speak. And He will announce to you things to come.
Joh 16:14 He will glorify Me, for He will receive of Mine and will announce it to you.
Now of course the Spirit is the Spirit of Christ, but this doesn't mean the Spirit is Christ. Christ is in heaven waiting to return.
Jesus said He will come to them, not "I will come to you again as a Spirit". I take "another Comforter" literally, ..another.. meaning a different person..and as for Christ speaking of the Spirit as another person not as Himself in Spirit-form..yep.. makes sense to me..
Hey, at least I can comprehend plain english.