These are my first completion time scores.

Mission	Power	Speed	Tech	Total
Anglo Attack	93%	80%	95%?	89% (A)
Rally the Defenses	100%	86%	99%	95% (S)
A Matter of Honor	97%	95%	92%	94% (S)
Showdown at Big Honshu	100%	82%	100%	94% (A)
Repel the Enemy	95%	91%	100%	95% (S)
Line in the Sand	92%	58%	97%	82% (B)
Wings of the Gunship	97%	59%	94%	83% (B)
Enemies Undone	96%	80%	91%	89% (A)
Shipyards Ablaze	97%	77%	94%	89% (A)
Up Periscope	100%	92%	100%	97% (S)
Operation Reprimand	100%	64%	100%	88% (A)
Their Finest Hour	99%	83%	81%	87% (A)
Incursion	100%	46%	100%	82% (B)
Purge	99%	100%	100%	99% (S)
Apocalypse	95%	69%	98%	87% (A)
Scorched Earth	98%	55%	82%	78% (B)
Operation Nautilus	100%	51%	100%	83% (B)
Ice Station X	75%	34%	89%	66% (C)
The Reckoning	99%	78%	70%	82% (B)

Yeah, Speed is frequently where I do bad in.

My new scores so far:

Mission	Power	Speed	Tech	Total
Anglo Attack (2)	100%	100%	100%	100% (S)
Rally the Defenses (2)	100%	100%	100%	100% (S)
A Matter of Honor (2)	100%	100%	100%	100% (S)
Showdown at Big Honshu (2)	100%	100%	100%	100% (S)
Repel the Enemy (2)	95%	91%	100%	95% (S)
Repel the Enemy (3)	100%	100%	100%	100% (S)
Line in the Sand (2)	97%	85%	100%	94% (A)
Line in the Sand (3)	95%	89%	100%	94% (A)
Line in the Sand (4)	100%	95%	100%	98% (S)
Line in the Sand (5)	100%	100%	100%	100% (S)
Wings of the Gunship (2)	96%	76%	100%	90% (A)
Wings of the Gunship (3)	96%	94%	100%	96% (S)
Wings of the Gunship (4)	96%	100%	100%	98% (S)
Wings of the Gunship (5)	100%	100%	100%	100% (S)
Enemies Undone (2)	96%	100%	100%	98% (S)
Enemies Undone (3 & 4)	99%	100%	100%	99% (S)
Enemies Undone (5)	100%	100%	100%	100% (S)
Shipyards Ablaze (2)	100%	77%	100%	92% (A)
Shipyards Ablaze (3)	100%	77%	100%	92% (A)
Shipyards Ablaze (4)	100%	82%	100%	94% (A)
Shipyards Ablaze (5)	100%	97%	100%	99% (S)
Shipyards Ablaze (6)	100%	100%	100%	100% (S)
Up Periscope (2)	99%	100%	100%	99% (S)
Up Periscope (3)	99%	100%	100%	99% (S)
Up Periscope (4)	100%	100%	100%	100% (S)
Operation Reprimand (2)	100%	91%	100%	97% (S)
Operation Reprimand (3)	100%	100%	100%	100% (S)
Their Finest Hour (2)	100%	100%	100%	100% (A)
Incursion (3)	100%	76%	100%	92% (A)
Incursion (4)	100%	88%	100%	96% (S)
Incursion (5)	100%	89%	100%	96% (S)
Incursion (6)	100%	93%	100%	97% (S)
Incursion (7)	100%	100%	100%	100% (S)
Purge (2)	100%	100%	100%	100% (S)
Apocalypse (2)	100%	100%	100%	100% (S)
Scorched Earth (2)	100%	95%	97%	97% (S)
Scorched Earth (3)	98%	100%	100%	99% (S)
Scorched Earth (4)	98%	100%	100%	99% (S)
Scorched Earth (5)	100%	100%	100%	100% (S)
Operation Nautilus (2)	100%	100%	100%	100% (S)
Ice Station X (2)	75%	68%	100%	81% (B)
Ice Station X (3)	100%	70%	100%	90% (A)
Ice Station X (4)	100%	98%	100%	99% (S)
Ice Station X (5)	100%	100%	100%	100% (S)
The Reckoning (2)	100%	71%	80%	83% (B)
The Reckoning (3)	100%	73%	91%	88% (A)
The Reckoning (4)	100%	75%	91%	88% (A)
The Reckoning (5)	100%	92%	99%	97% (S)
The Reckoning (6)	100%	77%	87%	88% (A)
The Reckoning (7)	100%	90%	95%	95% (S)
The Reckoning (	100%	100%	92%	97% (S)
The Reckoning (9)	98%	100%	92%	96% (S)
The Reckoning (10)	100%	100%	93%	97% (S)
The Reckoning (11)	100%	100%	100%	100% (S)