Coming from WP7 to android & the Thunderbolt?

[Gixxer29]

Hey guys, whats up. All i can say is i've used Windows ever since the apache came out in like 2003 so using android will be different for me but i had a couople of questions since it will be delivered tommorrow. I just sold my HTC HD7 which was buttery smooth, but i just wanted something different all of a sudden. Will I still be able to use and edit excel files on it? Is 4g on Verizon really that much faster? I know it is in all the speedtest but I mean real-world situations like downloading youtube, web surfing and things like that. Do I have to root just to get cool apps? I just have no clue so wondering if you guys can help me out and give me some peace of mind that i did the right thing. Thanks in advance.