Are the speeds of fast MicroSD usable?

[IT_Architect]

Are the speeds of fast MicroSD usable? I work in IT and I use flash drives to update software and do backups of critical information at times. The slow speeds at which they write, and the difficulty of keeping track of them have me thinking about using one in my TP2 instead. However, will a fast MicroSD increase the speed as expected, or will the bottleneck end up being the TP2?