eric12341 - According you a post you made in
this thread, if I understood correctly, the PCS bands can allow 3G service and speeds on Tmobile which would be the 850 and 1900 bands on the Sprint TP2. Also it appears that the 1700 and 2100 are AWS bands and allow for 3G (HSPA) and 4g (HSPA). Since the Sprint TP2 doesn't have the 1700 band it would only function on the PCS 3G which so far sounds to be slower than the AWS 3G.
I am guessing that is because there is less congestion on the AWS bands or is it because AWS offers some other benefit? I'm assuming that Tmobile 3G is HSPA regardless of the frequency and band classification (AWS vs HSPA).
Also as you mentioned the "refarming" of frequencies this fall and from a link I provided stating the same thing, I'm assuming that by adding more frequencies taken from the GSM side to the HSPA/HSPA+ side of the PCS spectrum, it is the extra bandwidth that will allow for faster 3G speeds because of less congestion. Please correct me if I have made any wrong assumptions, I'm sure you and others can see that I'm trying to piece things together!