Which version of archer?
@Kobra678: Both Illya and Shirou happen to be Magi, even more absurd given that Illya is the most competent Master in the Holy Grail War and Shirou being a guy who has Eye of Mind which enables him to analyse every situation down to the slightest detail even in the heat of battle.
And also, the fight Berserker vs Archer is anime only and we never see what happens there in canon.
Cacl for Saber and LancerZero. FSN Lancer is faster yet Archer keeps up with him, not to mention that Archer can easily track his own mach 15 arrow.
@VoidShiki: Even if they are Magi, neither of them have shown anything at even peak human. Ilya, still has the reflexes and sight of a little girl. All Shirou has is practically a photographic memory.
This Archer is from anime only, so consider everything that happened between them canon. Why did you bring up saber anyways? The only time she and Archer fought was on episode 3 and she blitzed him.
Which arrow are you talking about?
@Kobra678: Given that every Magi has supersonic to hypersonic reactions as a minimum, no. And Shirou has mach 40+ speed feats in Heaven's Feel when he gets a fraction of Archer's power. As said Shirou has Eye of Mind which pretty much borders on precognition, Word of God says so look it up on the wiki before talking bullshit.
Where did you see the OP saying "anime only"? That up there is a picture of VN Archer and even if not specified you go for the canon version. Archer was "speed-blitzed" by Saber only in the beginning and the novel goes on with explaining later that it was because he was surprised and recognized her, Later on when being weakened and at only 1/10 of his power he keeps up with her just fine.
And the arrow i'm talking about is Hrunting - Hound of the Red Plains, it crossed more than 4 km under a second.
The only knowledge you have seems to come from the anime, in other words you have no knowledge at all.