Sprinters lean forward all the time right at the finish line. Why do they do that if it doesn't help them hit the tape slightly sooner? There are a couple of legitimate arguments against sliding into first IMO. (I haven't read the whole thread, so maybe this has already been covered. 1)Injury. I think it's far more likely to get hurt sliding into first than other bases as the ideal way to slide into first is actually to slide through first. Which leads me to... 2)Sliding through the bag. This is extremely tough to do without going outside the baseline. Just sliding into first by definition is going to slow you down, as you would have the goal of stopping on the bag, which is not necessary at first. That said, if you're 6 feet tall, when you slide, that means that's 6 feet less that your feet have to travel en route to the bag. It's essentially shaving off distance. I do believe that it's faster to slide in, but I'm not sure the negatives outweight the positives. I also wonder if sliding into first would be more beneficial to a slow guy than to a fast guy. A slow guy likely has an awkward stride anyway, and may be less "slowed down" is his preparation for the slide.